Seiko Cal. 4491 - 912

Seiko 4491-912

This Automatic model from 1972 features a 43mm Hardlex-Coated Steel case. Powered by the 4491 caliber with 35j jewels beating at 36,000 bph, it delivers a 62 hours power reserve. [seikata-wm-66c7b5d666c8]

Also known as: Helmet

Specifications

Movement
Automatic
Case Material
Hardlex-Coated Steel
Case Width
43mm
Case Thickness
13.9mm
Lug Width
18mm
Crystal
Mineral
Bezel
Bidirectional
Water Resistance
160m
Dial Color
Green
Jewels
35j
Frequency
36,000 bph
Power Reserve
62 hours
Year
1972

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