Seiko Cal. 5641 - 518

This Automatic model from 1975 features a 39mm Stainless Steel case. It features a Green dial protected by a Acrylic crystal and offers 30m of water resistance. [seikata-wm-3b5a792e0711]

Also known as: Sumo, Helmet

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

13.6mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

30m

Dial Color

Green

Jewels

35j

Frequency

28,800 bph

Power Reserve

62 hours

Year

1975

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