Seiko Cal. 3865 - 204

Seiko 3865-204

This Spring Drive model from 1975 features a 42mm Stainless Steel case. Powered by the 3865 caliber with 24j jewels beating at 21,600 bph, it delivers a 59 hours power reserve. [seikata-wm-80fb7f8bd47c]

Also known as: Monster

Specifications

Movement
Spring Drive
Case Material
Stainless Steel
Case Width
42mm
Case Thickness
10.4mm
Lug Width
22mm
Crystal
Acrylic
Bezel
Bidirectional
Water Resistance
150m
Dial Color
Blue Sunburst
Jewels
24j
Frequency
21,600 bph
Power Reserve
59 hours
Year
1975

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