Seiko Cal. 6642 - 736

This Quartz model from 1978 features a 44mm Hardlex-Coated Steel case. Powered by the 6642 caliber with 20j jewels beating at 36,000 bph, it delivers a 38 hours power reserve. [seikata-wm-96f0a7b32d49]

Also known as: Helmet, Sea Horse

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

13.5mm

Lug Width

18mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

180m

Dial Color

Navy

Jewels

20j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1978

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