Seiko Cal. 6642 - 740

The Seiko 6642-740 represents an important milestone in Seiko's 1970 lineup. It features a Burgundy dial protected by a Hardlex crystal and offers 190m of water resistance. [seikata-wm-989f855b9370]

Also known as: Silverwave

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

40mm

Case Thickness

10.7mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Burgundy

Jewels

36j

Frequency

36,000 bph

Power Reserve

60 hours

Year

1970

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