Seiko Cal. 5641 - 820

This Spring Drive model from 1972 features a 36mm Hardlex-Coated Steel case. It features a Green dial protected by a Mineral crystal and offers 90m of water resistance. [seikata-wm-9113adb16e48]

Also known as: Crown, Emperor

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

15.1mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

90m

Dial Color

Green

Jewels

17j

Frequency

36,000 bph

Power Reserve

43 hours

Year

1972

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