Seth Thomas Adamantine Mantel Clock, 1895, Beautiful Tan with Deep Red and Orange Swirls

Here’s a most beautiful Seth Thomas Adamantine mantel clock I repaired. My customer polished the case, and I repaired the movement, gently cleaned and lacquered the case ornaments, and cleaned the dial.

The case background color is tan, with deep red lines and swirls, and some orange swirls too. The dial is embossed brass. The date code on the bottom of the case is 5981 C (March 1895).

The clock strikes the hour and half-hour on a heavy coil gong (often called Cathedral gong). The movement is the 8-day “hip” movement (called that because of its shape). It has an American type “strip” recoil escapement in the back.

The case is 17 inches wide and 11 1/2 inches tall.

IMG_9294 IMG_9289 IMG_9288See more pictures.

Repair job 6437. I made new rivets for the clicks, secured the regulator pinion to its arbor, polished the pivots, and installed 14 bushings. The mainsprings are original, and are as follows:

Time Mainspring: 11/16 inch wide by 0.0195 inch thick

Strike Mainspring: 11/16 inch wide by 0.0187 inch thick

These mainsprings seem thick, but had not caused much wear to the mainwheel teeth. If the springs needed replacing, thinner new ones should be used.

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  1. we purchased a Seth Thomas clock at an auction this week and is has the adamantine finish…roman numerals…was wondering if you might know something about it if I sent you a photo…curious as to how old it is and perhaps the value of it…

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