Seiko Cal. 6640 - 670

This Solar model from 1988 features a 43mm Titanium case. It features a Black dial protected by a Hardlex crystal and offers 90m of water resistance. [seikata-wm-be0ea056c841]

Also known as: Bullhead

Specifications

Movement

Solar

Case Material

Titanium

Case Width

43mm

Case Thickness

10.7mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

90m

Dial Color

Black

Jewels

20j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1988

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