Seiko Cal. 6644 - 864

This Kinetic model from 1965 features a 40mm Two-Tone case. Powered by the 6644 caliber with 27j jewels beating at 28,800 bph, it delivers a 56 hours power reserve. [seikata-wm-e25270012b4e]

Also known as: Tuna, Sea Horse

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

40mm

Case Thickness

13.9mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Black

Jewels

27j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1965

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