I repaired this Seth Thomas tambour mantel clock. It has the later type of windup movement (that replaced the popular No 89). The case is 8 1/16 inches tall and 18 inches wide. The dial is silvered brass with printed numerals.
The movement is model 4605, dated 7-39 (July 1939). It does bim-bam strike on the quarter hours, and single-gong strike on the hour. The escapement is deadbeat with diamond-shaped pin pallets (like in the later No. 124 movements). It has rack and snail striking so that the striking will not get out of sync.
Repair job 7157. The customer sent me this movement and a similar parts movement that had regular hour and half hour striking. He had swapped some parts, so my first task was selecting the correct parts for quarter-hour striking. I polished the pivots, installed 21 bushings, installed thinner mainsprings (11/16 by .0165 by 90 inches, to replace the original 11/16 by .0178 inch thick springs, which cause excessive wear).
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