Seiko Cal. 5617 - 230

This Automatic model from 1981 features a 40mm Stainless Steel case. It features a Black dial protected by a Acrylic crystal and offers 110m of water resistance. [seikata-wm-3c155c927d66]

Also known as: Helmet, World Timer

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

9.5mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

110m

Dial Color

Black

Jewels

21j

Frequency

21,600 bph

Power Reserve

44 hours

Year

1981

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