About the Seth Thomas “Office No. 1” Clock
Title: Seth Thomas “Office No. 1” Clock Model: A Collector’s Guide
The Seth Thomas “Office No. 1” clock is an iconic mantel clock from the renowned American clockmaker, produced between the late 19th and early 20th centuries. This model belongs to the category of mantel clocks, designed to be placed on a shelf or mantelpiece rather than mounted directly to a wall.
The Office No. 1 clock features a classically elegant design, with a rectangular case typically made of walnut or mahogany veneer over a solid oak core. The case is adorned with intricate inlays and brass accents, giving it an exquisite appeal that complements any decor. The dial, featuring Arabic numerals and blued steel hands, sits beneath a glass cover.
This model is highly collectible due to its combination of craftsmanship, design, and historical significance. As one of the earliest office clocks produced by Seth Thomas, it represents a pivotal moment in the evolution of clockmaking. Notable features include a rack striking mechanism that produces a distinct, authoritative sound, and a weight-driven time-only movement, which provides both hour and minute indications.
Collectors appreciate the Office No. 1 for its rarity, as it was produced in limited quantities compared to other Seth Thomas models. Its excellent condition and originality are key factors that significantly impact its value. As with any antique clock, proper care, maintenance, and provenance documentation can enhance its collectibility and appreciation over time.
Auction Records and Price History
The following 15 auction record(s) show actual sale prices for the Seth Thomas “Office No. 1” model clock. Prices vary based on condition, originality, and current market demand. Search for more records on AntiqueClocksPriceGuide.com.

Antique Seth Thomas Office No. 1 Clock
Jan 2021 – 136
Antique American Clocks
Seth Thomas “Office No. 1”, ca. 1879.
A 25-inch case with good rosewood veneer, both glasses
original with the tablet retaining both the gilt and black background.
The metal dial is flaking and has been touched up; the
hands are correct.
The signed time-only movement, 8 days, will only run for a minute with an uneven beat.
A good label
Horton’s sold one in 2019 for $150.
Retail: $100 | Date: 01/01/2021 | Source: AntiqueAmericanClocks.com

Seth Thomas Clock Co., C.1925, “OFFICE No. 1” timepiece, in a square poplar case with mahogany finish, 12 inch Arabic dial.
the case has been attractively refinished, othrewise, excellent condition, clean and running briskly. Clean dial with good signature; half dozen small flakes. Ht 16″
Sold: $161 | Date: 5/15/2010 | Source: R. O. Schmitt Fine Arts

Seth Thomas Clock Co., Thomaston, Conn., “Office No. 1”, 8 days, time & strike mahogany veneer wall clock. This clock was originally exported to England as evidenced by the name and place painted on the dial, c1874
Mahogany veneered case in nice condition in original finish. Original painted dial with some small inpainted chipped areas. Hands are original. Original tablet with some minor restoration to the painted background. Movement is signed. Nice clean label inside the case. Ht 25.5″
Sold: $400 | Date: April 27, 2014 | Source: R. O. Schmitt Fine Arts

C.1922, Seth Thomas Clock Co., Thomaston, Conn., “Office No. 1” 8-day oak wall timepiece
in very good original condition. In this sale we also have a mahogany version (see lot 290). This lot is a very nice example with a very clean label on the back describing the operation of the No. 41 movement. This clock is running, good looking and ready to enjoy. Height 16″
Sold: $425 | Date: April, 2002 | Source: R. O. Schmitt Fine Arts

C.1922, Seth Thomas Clock Co., Thomaston, Conn., “Office No. 1” 8-day wall timepiece.
This mahogany model is stained very dark with original crazed finish. There is some fading of the numbers and as it typical of Seth Thomas dials, some paint loss. The case has a gouge on the left side that can be filled; chip on lower left corner; back of case is warped. The movement is properly signed. An affordable Seth Thomas clock for the beginning collector. Height.15 1/4″
Sold: $100 | Date: April, 2002 | Source: R. O. Schmitt Fine Arts

Seth Thomas “Office # 1” Wall Clock, 1875
has pendulum and key; painted tin dial; 8 day; T & S; good interior label; gilt decorated door. (Dial has some roughness and is discolored.) Running and striking at this time. 25″
Sold: $225 | Date: Feb 18th, 2012 | Source: Tom Harris Auctions

Seth Thomas “Office No. l”, ca 1922.
8 day time only, 12 inch original zinc dial with 1 scratch you can see just to the left of the minute hand, otherwise just normal wear. 16 inch mahogany case. Ly-Seth Thomas No.527.
Sold: $150 | Date: January, 2002 | Source: Horton’s Antique Clocks

Seth Thomas “Office No.1”, ca 1875. Walnut veneer case, 25 inches high, has retained much of its original look.
Very little deterioration of the finish. It has all the original buttons which distinguishes this case style clock. There is a full label in the case, but is very dark. Original dial with advertising,” Lash & Co., Toronto”. 8 day, striking hours on a coil gong. Old pendulum bob. Ly-Seth Thomas No.510.
Sold: $452 | Date: January, 2002 | Source: Horton’s Antique Clocks

Seth Thomas Clock Co. “Office No. 1”, ca 1922. 8 day time only, 12 inch zinc painted dial has one big “Oops” above the 6.
The dial otherwisejust has normal wear. The brown (mahogany) case is 16 inches square. Trapdoor in the bottom to access the pendulum. Nice old clock with a lot of goodyears running left. Ly-Seth Thomas No. 527.
Sold: $186 | Date: July, 2003 | Source: Horton’s Antique Clocks

Seth Thomas “Office No. 1”, ca 1922.
I don’t believe it is that old because the 16 inch mahogany case is excellent, very clean, no doubt lived a charmed life or cleaned by an expert. Dial is also perfect. 8 day, time only, running. Hands, pendulum, full label on the back, are all original. Ly-Seth Thomas #527.
Sold: $225 | Date: June, 2004 | Source: Horton’s Antique Clocks

Seth Thomas Clock Co., Thomaston, Conn., “Office No. 1” wall clock with an 8 day spring driven brass timepiece movement in a mahogany veneered case, c1880.
The case retains its original finish. The painted dial is original but has had a newer glossy surface applied. The hands are original. The upper and lower door glasses are original, however the gilt design on the lower glass is now gone. The interior case label is in excellent condition. The movement is signed.
Sold: $300 | Date: May 15, 2016 | Source: R. O. Schmitt Fine Arts

Seth Thomas Clock Co., Thomaston, Conn., “Office No. 1” hanging clock in a rosewood case with a spring driven, 8 days, time and strike movement, c1875.
The rosewood case is in excellent condition with original finish. The original painted dial shows some restoration at the screw holes and fading of the numerals. The hands are original. The lower black and gilt tablet is original and in nice condition. The upper door glass is original. The movement is signed. There is a nice manufacturer’s setup instruction sheet inside the case. Ht 25 3/8″.
Sold: $250 | Date: October 25, 2015 | Source: R. O. Schmitt Fine Arts

Seth Thomas Clock Co., Thomaston, Conn., “Office No. 1”, 8 day, spring brass movement wall clock or timepiece, c1913
Oak case in nice condition in original finish. Original painted dial with a couple of scratches in the paint. Hands are original. Ht 15 1/2″
Sold: $180 | Date: October 26, 2013 | Source: R. O. Schmitt Fine Arts

Clocks- 2 (Two) Seth Thomas Clock Co., Thomaston, Conn., gallery clocks (1) “Office No. 1″ gallery 8 day spring driven time and strike, in 15 1/4″ x 15 1/4” dark stained case, c1924. (2) “Office No. 11″ 30 day time only, spring driven movement (86AK).in 15 1/4″ by 15 1/4” oak case, c1921.
(1) The case is 3 1/4″ deep. The 12″ dial has been repainted. The hands are original. Ht 15 1/4″ (2) The case is 4″ deep and retains some original finish. The new 12″ paper dial is incorrect since it does not allow for the seconds bit. The hands are original. Ht153/4″
Sold: $225 | Date: October 26, 2014 | Source: R. O. Schmitt Fine Arts

Seth Thomas Clock Co., Thomaston, Conn., “Office No. 1” rosewood, 8 day, time only, wall clock, c1879
this clock has been nicely restored, with a polished finish on the bold grain rosewood, and a repainted dial. The original blue/gold inside label is mostly intact, as is the lower geometric glass. The hands are replacements that are a bit too large. Ht 25″
Sold: $475 | Date: October 28, 2012 | Source: R. O. Schmitt Fine Arts