Seiko Cal. 5639 - 661

This Hand-Winding model from 1994 features a 36mm Stainless Steel case. It features a Green dial protected by a Hardlex crystal and offers 180m of water resistance. [seikata-wm-c316bad70af9]

Also known as: Helmet

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

13.6mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Green

Jewels

35j

Frequency

21,600 bph

Power Reserve

46 hours

Year

1994

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