Seiko Cal. 6640 - 289

The Seiko 6640-289 represents an important milestone in Seiko's 1979 lineup. Powered by the 6640 caliber with 29j jewels beating at 36,000 bph, it delivers a 59 hours power reserve. [seikata-wm-c18a30ddb7e1]

Also known as: Turtle, Emperor

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

44mm

Case Thickness

10.9mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Navy

Jewels

29j

Frequency

36,000 bph

Power Reserve

59 hours

Year

1979

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