Seiko Cal. 6644 - 729

The 6644-729 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 6644 caliber with 21j jewels beating at 21,600 bph, it delivers a 68 hours power reserve. [seikata-wm-fc72e71c4669]

Also known as: Tuna, Navigator

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

36mm

Case Thickness

14.1mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Green

Jewels

21j

Frequency

21,600 bph

Power Reserve

68 hours

Year

1974

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