Seiko Cal. 6644 - 107

This Hand-Winding model from 1980 features a 38mm Hardlex-Coated Steel case. It features a Green dial protected by a Acrylic crystal and offers 190m of water resistance. [seikata-wm-69dc9615e829]

Also known as: Sumo, Bullhead

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

11.9mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

190m

Dial Color

Green

Jewels

31j

Frequency

21,600 bph

Power Reserve

40 hours

Year

1980

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