Seiko Cal. 6640 - 346

This Automatic model from 1979 features a 42mm PVD Black case. It features a Champagne dial protected by a Hardlex crystal and offers 140m of water resistance. [seikata-wm-3ce7328a3386]

Also known as: Sumo

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

42mm

Case Thickness

13.1mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

Champagne

Jewels

20j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1979

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