Seiko Cal. 6641 - 658

The Seiko 6641-658 represents an important milestone in Seiko's 1969 lineup. It features a Green dial protected by a Hardlex crystal and offers 80m of water resistance. [seikata-wm-10f6055e8895]

Also known as: Monster, Flighty

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

36mm

Case Thickness

10.1mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

80m

Dial Color

Green

Jewels

32j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1969

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