Seiko Cal. 6647 - 879

This Solar model from 1977 features a 36mm Titanium case. It features a Navy dial protected by a Hardlex crystal and offers 130m of water resistance. [seikata-wm-b5a1a674ff63]

Also known as: Helmet, Sportsmatic

Specifications

Movement

Solar

Case Material

Titanium

Case Width

36mm

Case Thickness

9.9mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Navy

Jewels

32j

Frequency

36,000 bph

Power Reserve

64 hours

Year

1977

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