Seiko Cal. 6640 - 499

This Hand-Winding model from 1970 features a 44mm Titanium case. The Rotating bezel and 44mm case give it a distinctive presence on the wrist. [seikata-wm-121f94c687ff]

Also known as: UFO, Crown

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

44mm

Case Thickness

10.9mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

130m

Dial Color

Blue Sunburst

Jewels

17j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1970

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