Seiko Cal. 5640 - 273

This Quartz model from 1988 features a 41mm Hardlex-Coated Steel case. Powered by the 5640 caliber with 24j jewels beating at 21,600 bph, it delivers a 36 hours power reserve. [seikata-wm-243d40ffa24f]

Also known as: World Timer, Sea Horse

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

8.7mm

Lug Width

18mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

190m

Dial Color

Cream

Jewels

24j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1988

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