Seiko Cal. 5640 - 785

The Seiko 5640-785 represents an important milestone in Seiko's 1967 lineup. Powered by the 5640 caliber with 34j jewels beating at 21,600 bph, it delivers a 69 hours power reserve. [seikata-wm-46f7770c69dc]

Also known as: UFO

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

36mm

Case Thickness

12.4mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Green

Jewels

34j

Frequency

21,600 bph

Power Reserve

69 hours

Year

1967

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