Seiko Cal. 4564 - 161

This Spring Drive model from 1984 features a 35mm Hardlex-Coated Steel case. With its 20mm lug width and 12.7mm profile, it sits comfortably on most wrists. [seikata-wm-13352ec91ce0]

Also known as: Helmet, Navigator

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

12.7mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

180m

Dial Color

Green

Jewels

30j

Frequency

36,000 bph

Power Reserve

61 hours

Year

1984

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