About the Seth Thomas “Mark 1 Deck Clock” Clock
Title: Seth Thomas “Mark 1 Deck Clock” – A Collector’s Delight
The Seth Thomas “Mark 1 Deck Clock,” a timeless masterpiece from the renowned American clockmaker, is a mantel clock model that graces any collector’s room with its elegant presence. This exquisite timepiece, produced primarily between the late 19th and early 20th centuries, embodies the craftsmanship and innovation for which Seth Thomas was famed.
The typical case materials of the Mark 1 Deck Clock are mahogany or walnut, with intricate inlays and exquisite veneers adorning its design. The clock features a square or rectangular case, standing at approximately 20 inches tall, and is equipped with a finely-crafted brass movement. The clock’s dial is usually white enamel, often featuring Roman numerals and a seconds hand, adding to its classic aesthetic.
What makes the Seth Thomas “Mark 1 Deck Clock” collectible is not only its stunning design but also its historical significance. As one of the most popular models from Seth Thomas, it represents a pinnacle in American clockmaking during the Victorian era. Notable features include the sturdy construction, precision movement, and the distinctive “Seth Thomas” signature on the dial, making each piece not only a functional timekeeper but also a testament to the rich history of American horology.
In addition to its collectible value, the Mark 1 Deck Clock is also admired for its timeless beauty and durability, making it an excellent addition to any antique clock collection. Whether displayed on a mantelpiece or as a centerpiece in a formal setting, this classic timepiece continues to captivate collectors with its enduring charm and historical significance.
Auction Records and Price History
The following 1 auction record(s) show actual sale prices for the Seth Thomas “Mark 1 Deck Clock” model clock. Prices vary based on condition, originality, and current market demand. Search for more records on AntiqueClocksPriceGuide.com.

Seth Thomas Clock Co. ships clock.
It is in a molded black bakelite case, hinged on the left, screw down on the right. The bowed glass appears to have been in heat for the glass has that look. I thought at first it was dirty but the problem is on the back side. Black dial is signed, “Mark 1-Deck Clock / U.S.Navy / N38364, 1941”, and signed by Seth Thomas at the bottom. Hands and dots are phosphorus coated. The pin holding the hinge is missing, nickel screw holding top to base is present. Movement winds, sets, and regulated from the back. I wound it but it did not kick over.
Sold: $126 | Date: 7/31/2010 | Source: Horton’s Antique Clocks