Seiko Cal. 5640 - 630

This Hand-Winding model from 1975 features a 45mm Two-Tone case. Powered by the 5640 caliber with 36j jewels beating at 28,800 bph, it delivers a 69 hours power reserve. [seikata-wm-40d66cbe5ae5]

Also known as: Samurai, Emperor

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

45mm

Case Thickness

8.8mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

50m

Dial Color

Black

Jewels

36j

Frequency

28,800 bph

Power Reserve

69 hours

Year

1975

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