Seiko Cal. 6657 - 981

The Seiko 6657-981 represents an important milestone in Seiko's 1976 lineup. Powered by the 6657 caliber with 19j jewels beating at 28,800 bph, it delivers a 38 hours power reserve. [seikata-wm-004b07e4283f]

Also known as: Monster, Arnie

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

36mm

Case Thickness

15.2mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

50m

Dial Color

White

Jewels

19j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1976

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