Seiko Cal. 0764 - 731

The Seiko 0764-731 represents an important milestone in Seiko's 1971 lineup. Powered by the 0764 caliber with 27j jewels beating at 21,600 bph, it delivers a 62 hours power reserve. [seikata-wm-83e9fa68b2bb]

Also known as: Shogun, Helmet

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

34mm

Case Thickness

9.4mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

70m

Dial Color

Black

Jewels

27j

Frequency

21,600 bph

Power Reserve

62 hours

Year

1971

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