Seiko Cal. 4481 - 957

Seiko 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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