Seiko Cal. 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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