About the Seth Thomas “Regulator No. 1 Extra” Clock
Title: Seth Thomas “Regulator No. 1 Extra” Clock Model
The Seth Thomas Regulator No. 1 Extra is a testament to the exceptional craftsmanship and precision timekeeping of one of America’s oldest clock companies. This model belongs to the category of regulators, designed primarily for scientific or laboratory use due to their high accuracy.
Typical case materials for the Regulator No. 1 Extra include mahogany, walnut, cherry, and rosewood, with brass accents on the dial, weights, and pendulum rods. The design features a robust, heavy base, a tall, slender case, and an ornately decorated brass-faced dial. The hour and minute hands are long, thin, and elegantly designed to ensure precise readings.
Produced between 1870 and the early 20th century, the Regulator No. 1 Extra is a product of Seth Thomas’ golden era. Its collectibility stems from its rarity, as it was produced in limited quantities due to its specialized purpose and high production cost. Notable features include the pendulum with a polished brass bob suspended from a beautifully crafted brass rod, and the finely tuned brass movement that ensures exceptional timekeeping accuracy.
Additionally, the Regulator No. 1 Extra is significant for its historical context. As one of Seth Thomas’ most advanced clocks during the industrial revolution, it represents a crucial period in American clockmaking history. Its longevity and continued functionality make it an attractive addition to any antique clock collection.
Auction Records and Price History
The following 20 auction record(s) show actual sale prices for the Seth Thomas “Regulator No. 1 Extra” model clock. Prices vary based on condition, originality, and current market demand. Search for more records on AntiqueClocksPriceGuide.com.
C.1870, Seth Thomas Clock Co., Regulator No. 1 Extra,
time only, in rosewood. The veneer is in wonderful condition with no visible veneer damage, although some is loose, and minor loss on rear of bottom bracket so be careful how you pick it up. Both glasses are original. The dial, hands, pendulum and iron weight are original. The tablet has a great spider web of background, some paint loss, and some small losses to the gold. Best part is the superior label on weight baffle. Cord needs replacing. An extra nice example. Height 44 inches
Sold: $3,750 | Date: 10/1/2001 | Source: R. O. Schmitt Fine Arts
SETH THOMAS “REGULATOR NO. 1 EXTRA”. ROSEWOOD VENEERED CASE. CIRCA 1875.
8 DAY SINGLE WEIGHT MOVEMENT WITH ORIGINAL LABEL ON PANEL IN FRONT OF WEIGHT. BRASS PENDULUM BOB. OLD REPLACEMENT GLASSES. RESTORED PAINTED ROMAN DIAL WITH SECONDS BIT. H-40″ X W-20″X D-5″
Date: 10/21/2002 | Source: Clocksmith
C.1870, Seth Thomas, Regulator No. 1-Extra, single weight timepiece in rosewood, 8-day.
Condition: the rosewood veneer is still exceptional on this particular clock; the original finish over-coated to fill in some minor blemishes. The dial was professionally repainted in 1977. The inside of the case with the ink stamp impression of John Tanner of California; although it has changed hands since, it was part of his collection at one time. The original gold leaf tablet with some minor re-backing. For reference, see Tran Ly’s book on Seth Thomas, 3rd Edition [2004], page 272. With large round movement with front hung pendulum, cut pinions, and venire beat adjustment. Height 44 inches [110cm]
Sold: $4,000 | Date: 4/22/2007 | Source: R. O. Schmitt Fine Arts
![Seth Thomas Clock Co., Thomaston, Conn, C.1868, REGULATOR No.1 - EXTRA, in rosewood veneer, 8-day time and gong strike [2-wt].](https://antiqueclockspriceguide.com/images/robertoschmitt19/s_2091_a.jpg)
Seth Thomas Clock Co., Thomaston, Conn, C.1868, REGULATOR No.1 – EXTRA, in rosewood veneer, 8-day time and gong strike [2-wt].
this clock was purchased from John Delaney around 1990. The veneer has several bubbles, and is missing entirely in several small places, stained in so as not to show. The dial is original with several flakes around the circumference, and several other flakes curling up and ready to fall off. The label and tablet are outstanding. Also retains original printed paper beat scale. This striking movement has maintaining power and was designed by S. B. Terry. Mov’t is very clean; needs re-stringing. Ht 44″
Sold: $2,530 | Date: 5/15/2010 | Source: R. O. Schmitt Fine Arts
Seth Thomas Clock Co., Plymouth Hollow, Conn., “Regulator No. 1 Extra”, 8 day weight driven rosewood veneered wall time piece, c1875
This attractive case is nicely refinished rosewood veneer in nice condition. Gilt border on the bottom door now painted brown. Original painted dial with some loss at the mounting screws. Case houses the early round plate movement designed by S.B. Terry. Hands and weight are original. Seconds hands looks to be a little short. Original pendulum rod has lost its gilding. The label is fairly nice with some loss. Ht 44″.
Sold: $2,300 | Date: April 22, 2012 | Source: R. O. Schmitt Fine Arts
Seth Thomas Clock Co., Plymouth Hollow, Conn., “Regulator No. 1 Extra” hanging clock with a round plate, weight driven 8 day timepiece movement (S. B. Terry style) in a rosewood veneered case.
The rosewood case has been refinished. The veneered case bottom is replaced. The baffle board which originally had a label is replaced. The dial has been repainted and the hands are new. Both door glasses are original with the lower gilt design rebacked with black paint. The gilt pendulum rod is original as is the pendulum bob which shows the copper content of the earlier Seth Thomas bobs.
Sold: $1,000 | Date: April 29, 2017 | Source: R. O. Schmitt Fine Arts
Seth Thomas “Regulator No. 1 Extra”, ca 1860.
These early regulators used the SB Terry round, 8 day, time only movements I would think this case would have had a Plymouth Hollow label originally Some restoration has been done from time to time The sliding partitions were removed from many of these early clocks because the pendulum and weight are very difficult to hang if the partition is in place This partition and label are modern replacements The top glass has been replaced but the important one with the gold paint, is near perfect Like most all Seth Thomas dials, this one has been professionally repainted No doubt some veneering has been done but the false graining is excellent and makes it almost impossible to see any veneer repairs The flat weight that descends behind the partition is a good replica of the early ones 41 inch rosewood veneer case has a special key lock on the bottom door
Sold: $2,851 | Date: January, 2002 | Source: Horton’s Antique Clocks
Seth Thomas, “Regulator No. 1 Extra”, ca 1875.
8 day, time only using the Silas B Terry weight movement Outstanding 44 inch figured mahogany case,fully restored at some point The dial was repainted, but bottom glass and the gilt trim are original Brass pendulum bob, stick is gold gilt Old flat weight, original door lock There is about 90% of the original black label on the sliding partition Complete from the top thru “Seth Thomas, Thomaston Below that the board and label are missing If you have ever tried to get the weight out of a No 1 Extra case, you will understand why someone broke off part of the partition No 1 cases and movements are pictured in Ly-SethThomas, pages 108, 109
Sold: $3,125 | Date: January, 2002 | Source: Horton’s Antique Clocks
Seth Thomas “Regulator No. 1 – Extra”, C. 1865.
Rosewood veneer case is 41.5″ high, where the early catalogs touted them as 44″. The veneer is almost perfect, especially when compared to a dozen or so others I have sold, and the large number I have seen other places. There is a small nick on the right side of the bezel and some loose veneer on the base. You wouldn’t know it unless you carry the clock, then you feel it. This case inside and out is almost clean enough to say it has never been on the wall. No coal or tobacco smoke inside or out. The large 14.5″ zinc dial was repainted at least 50 years ago. The black paper label and white paper beat scale that are glued to the sliding partition, are the best I have ever seen. The tablet is original but the black paint has some re-backing. The gold always seems to hold to the glass. The round eight day movement is attributed to S. B. Terry. Seth Thomas continued to make them after they bought Terry’s old stock. The original flat iron weight descends down the middle of the case behind the sliding partition. Wood pendulum rod has the original gold, while the old bob got in the hands of an overenthusiastic polisher. Most of the brass has been buffed off leaving the copper undercoat. It isn’t the end of the world, but honestly is about the only negative thing I can say about this clock. Ly-Seth Thomas, pages 108-109.
Sold: $3,750 | Date: July, 2004 | Source: Horton’s Antique Clocks
Seth Thomas “Regulator No. 1 Extra”, ca 1860.
The round movement was either purchased from the creditors of Silas B. Terry in 1859, or made from the patterns purchased at the same time. The round 8 day, time only movements were used a short time before they went to the rectangle movements. The old zinc dial pan is original and has been professionally repainted. The gold around the glass and the gold painted wood stick, brass bob, and glasses, are also original. The sliding partition where a label should be has been added. It looks fine, hides the descending weight, but nonetheless there is no label. Rosewood veneer case like 99% of the octagon bezel clocks has had some minor repairs and I notice one small chigger bite that should be stained or a tiny piece of veneer put on. The base is a remake, well done, veneered to match. The catalogs say this model clock should be 44 inch. I have probably had 20 over the years, none were over 41.5 inch, same as this one. Large flat iron weight descends behind the partition Clock is running. Ly-Seth Thomas, page 108-109.
Sold: $0 unsold | Date: June, 2004 | Source: Horton’s Antique Clocks
Seth Thomas Clock Co., Plymouth Hollow, Conn., “Regulator No. 1 Extra” wall clock 8 day time and strike weight driven movement in rosewood veneered mahogany case with reverse painted tablet and painted metal dial, c1875
the case retains its original finish nicely rubbed in excellent condition with outstanding matching veneers. There is some touch-up to original dial and repaint to second’s bit. The label is in excellent condition. The Seth Thomas No. 1 Extra embossed pendulum bob and the tulip hands are original. The lower glass tablet is repainted on old glass. The weights are replacements. Ht 44″
Sold: $3500 | Date: May 15, 2011 | Source: R. O. Schmitt Fine Arts
Seth Thomas Clock Co., Plymouth Hollow, Conn., ÒRegulator No. 1 ExtraÓ wall clock, 8 days, time only, weight driven movement in rosewood veneered mahogany case with reverse painted tablet and painted metal dial, c1862
the case retains its original finish nicely rubbed in excellent condition with outstanding matching veneers. There is some minor touch-up to original dial and repaint in secondÕs bit. The label is in very good condition. The lower glass tablet is repainted on old glass. We sold this clock in our auction of October 2011, lot No. 470 for $3800 plus 15% BuyerÕs Premium. Ht 44Ò
Sold: $1,600 | Date: May 16, 2015 | Source: R. O. Schmitt Fine Arts
Seth Thomas Clock Co., Plymouth Hollow, Conn., ÓRegulator No. 1 ExtraÒ wall clock, 8 days, time and strike, weight driven movement in a rosewood veneered mahogany case with reverse painted tablet and painted metal dial, c1862
the case retains its original finish nicely rubbed in excellent condition with outstanding matching veneers. There is some touch-up to original dial and repaint to secondÕs bit. The label is in excellent condition. The Seth Thomas No. 1 Extra embossed pendulum bob and the tulip hands are original. The lower glass tablet is repainted on old glass. The weights are replacements. We sold this clock in our auction of May 2011, lot No. 756 for $3500 plus 15% BuyerÕs Premium. Ht 44Ó
Sold: $2,900 | Date: May 16, 2015 | Source: R. O. Schmitt Fine Arts
Seth Thomas Clock Co., Thomaston, Conn., “Regulator No. 1 Extra” with a weight driven, 8 day, timepiece movement in a walnut burl veneer case.
This is the clock pictured on page 273 of Tran Duy Ly’s “Seth Thomas Clocks & Movements- Third Edition- Volume 1”. The case is in very good condition with limited veneer loss on the base and on the left side of the bezel.. The original painted dial is in good condition except for some loss at 6. The hands are period. The seconds hand is proper style, but may be replaced. The case interior has a maroon flocking in the bottom portion. The paper beat indicator is original. Period embossed pendulum bob . The door glass is period but may have been taken out of the door to be rebacked. Walnut examples are less common than rosewood ones.
Sold: $750 | Date: May 19, 2018 | Source: R. O. Schmitt Fine Arts
Seth Thomas Clock Co., Plymouth Hollow, Conn., “Regulator No. 1, Extra” hanging clock with a weight driven, 8 day, time and strike movement in a rosewood veneered case.
The case is in very nice condition with very little veneer loss. The case has been refinished and the dial repainted. The pillow base has apparently been reconstructed, but not in the proper form. The lower tablet glass is replaced and the gilt band surrounding the lower glass is overpainted. The upper door glass is original. The hands are original. The sliding weight baffle inside the case is present, but the label originally on it is missing. A smaller board below the baffle is missing, thus no beat scale remains.
Sold: $800 | Date: May 19, 2018 | Source: R. O. Schmitt Fine Arts
Seth Thomas Clock Co., Thomaston, Conn., “Regulator No. 1 Extra”, wall clock, 8 days, time and strike, two weight driven movement in a rosewood veneer case with painted metal dial and reverse painted lower tablet, c1866
the original finish is nicely rubbed down with a series of small veneer flakes on inside of bezel. The dial has been clear coated with some flaking underneath. The lower tablet has been reblacked. The tulip style hands are original. The original gold leafed pendulum stick, label and beat scale are in excellent condition. Note the rectangular movement was designed by S. B. Terry. Ht 42″
Sold: $2,500 | Date: May 4, 2013 | Source: R. O. Schmitt Fine Arts
Seth Thomas Clock Co., Thomaston, Conn., “Regulator No. 1, Extra” 8 days, time (only) weight driven wall clock with large trapezoidal movement, c1875.
this as found clock is not for the faint at heart, but can come to life. It has no pendulum or weight. [weight cord goes up over a roller in the case top and down the right side, with a square bottom iron weight about 6 inches long] The rosewood veneered case has substantial veneer losses to the lower door and upper bezel. The original dial is very dirty, and with flakes, but the Dial House could clean and restore without repainting. Left quarter gilt molding is lacking from lower door. Bottom left OG return is missing as are both corbel shaped side pieces. The black & gilt tablet is missing. The original keystone failed and there is an envelope with some parts that could be modified to fit. For a similar clock in good condition, see Tran Duy Ly’s “Seth Thomas Clock & Movements” Vol. 1, p. 273 (although the c1880 date shown there is too late as the Regulator No. 3 replaced this model in 1879). An nice clock, but challenging project for the patient restorer. Ht 44″
Sold: $400 | Date: October 26, 2014 | Source: R. O. Schmitt Fine Arts
Seth Thomas Clock Co., Plymouth Hollow, Conn.. “Regulator No. 1 Extra” with 8 day weight driven timepiece movement (of the Silas B. Terry design) in a rosewood veneered case, c1865,
The beautiful rosewood case with original finish is in excellent condition. There may be a small amount of additional finish on the bottom section. The dial has been repainted. The hour and minute hands are original with the seconds hand a later replacement. The upper door glass is original and the lower tablet has excellent, original gilt design with minor loss of black backing. The pendulum rod has original gilt finish. The weight baffle boards have been repainted and do not have the Seth Thomas label or the beat indicator scale. Overall this is a very sharp looking example of this model. Ht 41″.
Sold: $1,700 | Date: October 26, 2014 | Source: R. O. Schmitt Fine Arts
Seth Thomas Clock Co., Thomaston, Conn., “Regulator No. 1 Extra” hanging clock with a round plate, weight driven, 8 day, S. B. Terry style timepiece movement in a rosewood veneered case.
The case has a very soft lustre finish which may be original. The case bottom is replaced as the veneer differs from that of the rest of the case. The painted dial appears to be original although there are several extra screw holes in the dial mounting board. Both door glasses are original with the lower gilt and black design showing some loss. The hour and minute hands are original. The seconds hand may be replaced.
Sold: $1100 | Date: October 27, 2018 | Source: R. O. Schmitt Fine Arts
Seth Thomas Clock Co., Plymouth Hollow, Conn., “Regulator No. 1 Extra” wall clock 8 day time and strike weight driven movement in rosewood veneered mahogany case with reverse painted tablet and painted metal dial, c1875
the case retains its original finish nicely rubbed in excellent condition with outstanding matching veneers. There is some minor touch-up to original dial and repaint in second’s bit. The label is in very good condition. The lower glass tablet is repainted on old glass. We sold a similar example in similar condition in our auction of May 15th, 2011, lot #756 for $3500. Ht 44″
Sold: $3,800 | Date: October 29, 2011 | Source: R. O. Schmitt Fine Arts