Seiko Cal. 3881 - 136

This Hand-Winding model from 1970 features a 34mm Hardlex-Coated Steel case. Powered by the 3881 caliber with 34j jewels beating at 28,800 bph, it delivers a 50 hours power reserve. [seikata-wm-e7a13db354b2]

Also known as: Helmet, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

14.4mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Champagne

Jewels

34j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1970

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