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Elgin Grade 313 Pocket Watch Identification & Technical Specs
Guild Home > Archive > Elgin Grade 313 Pocket Watch Identification & Technical Specs

Serial Number & Production Dating Lookup

Enter the 5 to 8 digit serial number stamped directly on the movement plate (not the watch case):

AMERICAN WATCHMAKER • American Watchmaker Elgin Grade 313 DIAMETER: 42.4 mm | JEWELS: 21 Jewels | FREQ: 18,000 BPH ARCHIVE SPEC
Original Horological Blueprint • American Watchmaker Elgin Grade 313 Movement Architecture

Technical Specifications & Factory Archival Records

Grade / ReferenceGrade 313
Movement Size16s
Jewel Count15 Jewels
Railroad CertificationStandard Grade (Non-Railroad)
Vibrations Per Hour18,000 BPH (2.5 Hz)
Balance Lift Angle50°
Power Reserve38 hours
Escapement TypeStraight line lever escapement
Balance Wheel ConstructionMonometallic balance
Hairspring SpecificationBreguet overcoil hairspring
Shock Protection SystemNone (Solid jewel settings)

Horological Architecture & Collector Notes

The American Grade 313 was engineered to meet rigorous American horological standards during the turn of the 20th century. Utilizing high-grade alloy components, a precision Straight line lever escapement, and 15 jewels with fine ruby endstones, this movement provided exceptional isochronism and positional stability.

Among vintage restorers and conversion specialists, this series is admired for its accessible gear train geometry and solid metallurgy, making surviving specimens excellent candidates for preservation and custom recasing.

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