Seiko Cal. 4481 - 957

The Seiko 4481-957 represents an important milestone in Seiko's 1978 lineup. Powered by the 4481 caliber with 17j jewels beating at 21,600 bph, it delivers a 38 hours power reserve. [seikata-wm-a8ba2d1f5ea2]

Also known as: Monster, Sportsmatic

Specifications

Movement

Solar

Case Material

Titanium

Case Width

34mm

Case Thickness

14.1mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

180m

Dial Color

Navy

Jewels

17j

Frequency

21,600 bph

Power Reserve

38 hours

Year

1978

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