Seiko Cal. 3897 - 612

The Seiko 3897-612 represents an important milestone in Seiko's 1983 lineup. Powered by the 3897 caliber with 26j jewels beating at 28,800 bph, it delivers a 46 hours power reserve. [seikata-wm-308ce851dd7f]

Also known as: Monster, Sportsmatic

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

40mm

Case Thickness

10.7mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

120m

Dial Color

White

Jewels

26j

Frequency

28,800 bph

Power Reserve

46 hours

Year

1983

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