Seiko Cal. 5640 - 503

This Spring Drive model from 1970 features a 34mm Gold-Plated case. Powered by the 5640 caliber with 21j jewels beating at 36,000 bph, it delivers a 47 hours power reserve. [seikata-wm-dacd849548a8]

Also known as: World Timer, Emperor

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

34mm

Case Thickness

14.8mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

160m

Dial Color

Black

Jewels

21j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1970

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