Seiko Cal. 5638 - 956

Seiko 5638-956

The Seiko 5638-956 represents an important milestone in Seiko's 1971 lineup. Powered by the 5638 caliber with 25j jewels beating at 21,600 bph, it delivers a 42 hours power reserve. [seikata-wm-3289cc36d367]

Also known as: Golden Tuna

Specifications

Movement
Spring Drive
Case Material
Stainless Steel
Case Width
45mm
Case Thickness
15.2mm
Lug Width
21mm
Crystal
Acrylic
Bezel
Rotating
Water Resistance
50m
Dial Color
White
Jewels
25j
Frequency
21,600 bph
Power Reserve
42 hours
Year
1971

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seikata-wm-3289cc36d367