Seiko Cal. 5688 - 819

This Spring Drive model from 1978 features a 39mm Hardlex-Coated Steel case. Powered by the 5688 caliber with 18j jewels beating at 36,000 bph, it delivers a 52 hours power reserve. [seikata-wm-b2da9915b101]

Also known as: Helmet, World Timer

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

13.3mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

190m

Dial Color

Black

Jewels

18j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1978

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