Vintage Elgin Mainspring – Size 10/0 to 18/0 (1957) Original fine steel mainspring for Elgin watches, made in Switzerland. Details: - Fits: Elgin 10/0 – 18/0 size movements - Year: 1957 - Dennison: 3½ × 10 - Metric: 1.27 × 0.09 - Brand: International Watch Supply Co. (Winston-Salem, NC) - Material: Fine Steel - Made in Switzerland This vintage mainspring packet was distributed by International Watch Supply Company. A great find for watchmakers, horology enthusiasts, or collectors seeking genuine Elgin replacement parts.
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