Seiko Cal. 6640 - 815

This Quartz model from 1976 features a 41mm PVD Black case. It features a Champagne dial protected by a Acrylic crystal and offers 80m of water resistance. [seikata-wm-cdcb1b3e89da]

Also known as: Sea Horse, Baby Tuna

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

41mm

Case Thickness

8.2mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

80m

Dial Color

Champagne

Jewels

20j

Frequency

21,600 bph

Power Reserve

48 hours

Year

1976

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