Seiko Cal. 6638 - 893

This Automatic model from 1969 features a 36mm PVD Black case. The Coin-Edge bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-1b0b76f773b2]

Also known as: Helmet

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

36mm

Case Thickness

14.4mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Navy

Jewels

20j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1969

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