Seiko Cal. 3881 - 640

Seiko 3881-640

This Automatic model from 1970 features a 38mm Stainless Steel case. Powered by the 3881 caliber with 19j jewels beating at 21,600 bph, it delivers a 45 hours power reserve. [seikata-wm-d0afa0b08897]

Also known as: Golden Tuna

Specifications

Movement
Automatic
Case Material
Stainless Steel
Case Width
38mm
Case Thickness
13.2mm
Lug Width
21mm
Crystal
Mineral
Bezel
Bidirectional
Water Resistance
90m
Dial Color
White
Jewels
19j
Frequency
21,600 bph
Power Reserve
45 hours
Year
1970

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seikata-wm-d0afa0b08897