Seiko Cal. 4550 - 764

This Spring Drive model from 1988 features a 38mm Titanium case. Powered by the 4550 caliber with 26j jewels beating at 36,000 bph, it delivers a 63 hours power reserve. [seikata-wm-8d3fd9804935]

Also known as: Samurai, Helmet

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

38mm

Case Thickness

14.1mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

80m

Dial Color

Green

Jewels

26j

Frequency

36,000 bph

Power Reserve

63 hours

Year

1988

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