Seiko Cal. 5649 - 667

This Spring Drive model from 1977 features a 39mm Titanium case. The Bidirectional bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-d4f1ac26265e]

Also known as: Helmet, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

39mm

Case Thickness

8.1mm

Lug Width

22mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

40m

Dial Color

White

Jewels

29j

Frequency

36,000 bph

Power Reserve

46 hours

Year

1977

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