Seiko Cal. 6639 - 938

This Quartz model from 1965 features a 46mm PVD Black case. It features a Green dial protected by a Sapphire crystal and offers 130m of water resistance. [seikata-wm-093ab082fd4f]

Also known as: Monster, Sumo

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

46mm

Case Thickness

9.9mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

130m

Dial Color

Green

Jewels

19j

Frequency

36,000 bph

Power Reserve

61 hours

Year

1965

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