Seiko Cal. 3891 - 900

This Automatic model from 1981 features a 37mm Stainless Steel case. Powered by the 3891 caliber with 18j jewels beating at 28,800 bph, it delivers a 41 hours power reserve. [seikata-wm-4c694d2056a5]

Also known as: World Timer, Flighty

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

8.7mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

110m

Dial Color

Navy

Jewels

18j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1981

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