About the Seth Thomas “Celtic” Clock
The “Celtic” mantel clock, manufactured by the renowned Seth Thomas Clock Company around 1913 and again in approximately 1921, is a striking example of their craftsmanship. This model boasts a finely finished bronzed white metal body, cast bronze base, and feet, with a brass cylindrical case enclosing the movement. The clock employs an 8-day model 51 style movement, featuring a silvered dial adorned with raised bronze numerals.
In the early 20th century, around 1921, Seth Thomas introduced another version of the “Celtic” clock, characterized by its brass case and ships bell strike mechanism, equipped with a 7 jewel escapement. The red brass case has been meticulously polished to a high sheen, while the engraved and silvered dial exhibits raised bronze numerals, albeit with a slight crookedness in the imprinted Seth Thomas name.
For those interested in the history of Seth Thomas clocks, this model can be found referenced in Ly’s 3rd Edition of Seth Thomas Clocks, Volume 2, on page 762, figure 2604. Standing at a height of 9 inches, the “Celtic” mantel clock is an intriguing addition to any collection.
Auction Records and Price History
The following 2 auction record(s) show actual sale prices for the Seth Thomas “Celtic” model clock. Prices vary based on condition, originality, and current market demand. Search for more records on AntiqueClocksPriceGuide.com.

C.1913, Seth Thomas Clock Co., “Celtic” mantel clock
The clock has a finely finished bronzed white metal body and cast bronze base and feet. The cylindrical case enclosing the movement is brass. The clock employs an 8-day model 51 style movement with a silvered dial and raised bronze numerals. Overall in very good condition, running and striking. Height 9″
Sold: $150 | Date: 4/21/2001 | Source: R.O. Schmitt Fine Arts

C.1921, Seth Thomas, CELTIC, brass cased, ships bell strike, 7 jewel escapement, mantel clock.
Condition: the red brass case has been polished to a high sheen. The movement ticks and strikes, but could stand cleaning. The engraved and silvered dial has raised bronze numerals, and the fellow who imprinted the ST name must have had a hard week end, as it is slightly crooked. Seth Thomas was trying to compete with Chelsea in offering this model, and at $85 in 1921, it was especially expensive. For reference, see Ly’s 3rd Edition of Seth Thomas Clocks, Volume 2, page 762, fig 2604. Height 9 inches
Sold: $425 | Date: May 6th, 2006 | Source: R. O. Schmitt Fine Arts