Seiko Cal. 5645 - 645

The Seiko 5645-645 represents an important milestone in Seiko's 1991 lineup. Powered by the 5645 caliber with 20j jewels beating at 36,000 bph, it delivers a 38 hours power reserve. [seikata-wm-3d99f5ccc5e0]

Also known as: Samurai, Helmet

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

11.2mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

100m

Dial Color

Green

Jewels

20j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1991

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