Seiko Cal. 5256 - 137

The Seiko 5256-137 represents an important milestone in Seiko's 1971 lineup. Powered by the 5256 caliber with 22j jewels beating at 28,800 bph, it delivers a 56 hours power reserve. [seikata-wm-ac329ee08b30]

Also known as: Turtle, Golden Tuna

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

11.8mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

60m

Dial Color

Cream

Jewels

22j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1971

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