Seiko Cal. 3894 - 641

Seiko 3894-641

This Spring Drive model from 1984 features a 46mm Hardlex-Coated Steel case. Powered by the 3894 caliber with 30j jewels beating at 21,600 bph, it delivers a 45 hours power reserve. [seikata-wm-e5d04b73bc00]

Also known as: World Timer, Navigator

Specifications

Movement
Spring Drive
Case Material
Hardlex-Coated Steel
Case Width
46mm
Case Thickness
12.4mm
Lug Width
21mm
Crystal
Acrylic
Bezel
Fixed
Water Resistance
110m
Dial Color
Cream
Jewels
30j
Frequency
21,600 bph
Power Reserve
45 hours
Year
1984

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