American stainless steel keyless winding pocket watch Circa 1923

Stainless steel open faced lever
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An American stainless steel keyless winding pocket watch made by Hamilton, circa 1923. An open faced, solid case, with an engraved monogram JRSC on the back. Silvered dial with suspended Arabic numerals, an outer minute track, subsidiary seconds at 6 o’clock and blued steel hands. The movement with a lever escapement, 17 jewels, a reed regulator. The case, dial and movement are signed.
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Diameter: 46 mm
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Weight: 78 g
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Signed: Hamilton Lancaster  Pennsylvania
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Accompanied by a steel chain, original fitted box, certificate of origin, and repair invoice (by Freeman’s Jewellery Shop, Chicago, Ill.)
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The dial is slightly oxidized.