Seiko Cal. 6640 - 163

This Automatic model from 1977 features a 42mm Stainless Steel case. It features a Green dial protected by a Acrylic crystal and offers 200m of water resistance. [seikata-wm-8dd1990900be]

Also known as: Bullhead

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

13.7mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

200m

Dial Color

Green

Jewels

36j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1977

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