Seiko Cal. 6643 - 165

The Seiko 6643-165 represents an important milestone in Seiko's 1977 lineup. Powered by the 6643 caliber with 20j jewels beating at 21,600 bph, it delivers a 40 hours power reserve. [seikata-wm-53938b382705]

Also known as: Samurai, Baby Tuna

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

44mm

Case Thickness

12.8mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Silver

Jewels

20j

Frequency

21,600 bph

Power Reserve

40 hours

Year

1977

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