Seiko Cal. 3891 - 663

The Seiko 3891-663 represents an important milestone in Seiko's 1983 lineup. Powered by the 3891 caliber with 30j jewels beating at 36,000 bph, it delivers a 56 hours power reserve. [seikata-wm-ffd34acbba98]

Also known as: World Timer

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

15.0mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

150m

Dial Color

Silver

Jewels

30j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1983

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