Seiko Cal. 6640 - 935

The Seiko 6640-935 represents an important milestone in Seiko's 1968 lineup. Powered by the 6640 caliber with 35j jewels beating at 21,600 bph, it delivers a 71 hours power reserve. [seikata-wm-f838dfb873df]

Also known as: Samurai, World Timer

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

14.9mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Cream

Jewels

35j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1968

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