Seiko Cal. 6647 - 974

This Hand-Winding model from 1990 features a 37mm Stainless Steel case. It features a Green dial protected by a Sapphire crystal and offers 180m of water resistance. [seikata-wm-1fea5ac05100]

Also known as: Helmet, Rally

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

15.2mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Green

Jewels

34j

Frequency

21,600 bph

Power Reserve

72 hours

Year

1990

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