Seiko Cal. 6643 - 749

This Spring Drive model from 1976 features a 43mm Titanium case. With its 21mm lug width and 13.6mm profile, it sits comfortably on most wrists. [seikata-wm-65032ba9db94]

Also known as: Rally

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

43mm

Case Thickness

13.6mm

Lug Width

21mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

110m

Dial Color

Blue Sunburst

Jewels

36j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1976

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