Seiko Cal. 5663 - 604

This Spring Drive model from 1978 features a 34mm Hardlex-Coated Steel case. With its 22mm lug width and 9.2mm profile, it sits comfortably on most wrists. [seikata-wm-e0f298b828fa]

Also known as: Helmet, Silverwave

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

9.2mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

90m

Dial Color

Green

Jewels

36j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1978

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