Seiko Cal. 6647 - 100

This Quartz model from 1988 features a 40mm Two-Tone case. It features a White dial protected by a Hardlex crystal and offers 40m of water resistance. [seikata-wm-5643b3d0e157]

Also known as: Helmet, Sportsmatic

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

40mm

Case Thickness

10.8mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

40m

Dial Color

White

Jewels

28j

Frequency

36,000 bph

Power Reserve

53 hours

Year

1988

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