Waltham, 18 Size, Pendant Set, 17 Jewel, Model #1883, Nickle Plate movement, in yellow gold fill, Philadelphia Watch Case Company. SS# 18,810,651 (1912)
Waltham, of Waltham Massachusetts was the second largest company and was the first to produce watches from interchangeable parts on an assembly line. It was one of the first two companies to produce in quantity by the beginning of the American Civil War.
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