Seiko Cal. 3881 - 138

Seiko 3881-138

The 3881-138 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 3881 caliber with 25j jewels beating at 21,600 bph, it delivers a 59 hours power reserve. [seikata-wm-02306d46a130]

Also known as: Monster, World Timer

Specifications

Movement
Hand-Winding
Case Material
PVD Black
Case Width
41mm
Case Thickness
12.1mm
Lug Width
18mm
Crystal
Mineral
Bezel
Rotating
Water Resistance
150m
Dial Color
Cream
Jewels
25j
Frequency
21,600 bph
Power Reserve
59 hours
Year
1965

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seikata-wm-02306d46a130