Seiko Cal. 3881 - 729

This Kinetic model from 1975 features a 46mm Hardlex-Coated Steel case. Powered by the 3881 caliber with 18j jewels beating at 21,600 bph, it delivers a 42 hours power reserve. [seikata-wm-5d1b9780bf04]

Also known as: Sportsmatic, Bellmatic

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

13.7mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

80m

Dial Color

White

Jewels

18j

Frequency

21,600 bph

Power Reserve

42 hours

Year

1975

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