Seiko Cal. 6642 - 172

This Spring Drive model from 1981 features a 37mm PVD Black case. It features a Silver dial protected by a Sapphire crystal and offers 70m of water resistance. [seikata-wm-6aeb6370ccbf]

Also known as: Monster, World Timer

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

37mm

Case Thickness

12.7mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Silver

Jewels

32j

Frequency

36,000 bph

Power Reserve

68 hours

Year

1981

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