Seiko Cal. 3881 - 136

Seiko 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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seikata-wm-e7a13db354b2