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The Encyclopedia of Horology

Calibre database

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Specifications

FieldWaltham Model 1883
Makerwaltham
CountryUnited States
Period1883 – c. 1920s
Diameter18 size
HeightVaries by grade
Jewels7 to 21 depending on grade
Frequency18,000 vph (2.5 Hz)
Power reserveApprox. 36 hours
WindingStem wind
SettingLever set and pendant set variants
EscapementLever
BalanceBimetallic compensation balance on higher grades
ComplicationsSubsidiary seconds
ArchitectureFull-plate 18 size model produced in enormous quantity across many grades, from low-jewel utility movements to adjusted railroad grades.