Seiko Cal. 5656 - 370

This Spring Drive model from 1965 features a 39mm Hardlex-Coated Steel case. With its 18mm lug width and 8.8mm profile, it sits comfortably on most wrists. [seikata-wm-39715b546ab1]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

8.8mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

90m

Dial Color

White

Jewels

20j

Frequency

36,000 bph

Power Reserve

58 hours

Year

1965

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