Seiko Cal. 5256 - 921

The Seiko 5256-921 represents an important milestone in Seiko's 1969 lineup. The Bidirectional bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-b36b03ae5209]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

10.8mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

70m

Dial Color

Cream

Jewels

18j

Frequency

21,600 bph

Power Reserve

66 hours

Year

1969

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