Seiko Cal. 6640 - 404

This Quartz model from 1977 features a 44mm PVD Black case. It features a Cream dial protected by a Sapphire crystal and offers 140m of water resistance. [seikata-wm-e9ae70ee136f]

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

44mm

Case Thickness

11.2mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

140m

Dial Color

Cream

Jewels

21j

Frequency

21,600 bph

Power Reserve

69 hours

Year

1977

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