Seiko Cal. 6643 - 770

This Quartz model from 1975 features a 37mm PVD Black case. It features a Cream dial protected by a Hardlex crystal and offers 110m of water resistance. [seikata-wm-5e762fed5ae7]

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

37mm

Case Thickness

8.4mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Cream

Jewels

24j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1975

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