Seiko Cal. 3881 - 642

The Seiko 3881-642 represents an important milestone in Seiko's 1988 lineup. Powered by the 3881 caliber with 34j jewels beating at 28,800 bph, it delivers a 41 hours power reserve. [seikata-wm-aac05aeab489]

Also known as: Tuna

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

10.1mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

130m

Dial Color

White

Jewels

34j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1988

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