Seiko Cal. 3871 - 342

Seiko 3871-342

This Automatic model from 1968 features a 37mm Stainless Steel case. Powered by the 3871 caliber with 18j jewels beating at 28,800 bph, it delivers a 40 hours power reserve. [seikata-wm-e72c78a2e00e]

Also known as: Tuna, Flighty

Specifications

Movement
Automatic
Case Material
Stainless Steel
Case Width
37mm
Case Thickness
13.5mm
Lug Width
21mm
Crystal
Hardlex
Bezel
Inner Rotating
Water Resistance
200m
Dial Color
Green
Jewels
18j
Frequency
28,800 bph
Power Reserve
40 hours
Year
1968

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