Seiko Cal. 6640 - 259

This Spring Drive model from 1980 features a 41mm Stainless Steel case. The Rotating bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-ff7cb197e978]

Also known as: UFO

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

14.8mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

40m

Dial Color

Black

Jewels

35j

Frequency

36,000 bph

Power Reserve

67 hours

Year

1980

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