Seiko Cal. 6644 - 616

The 6644-616 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 6644 caliber with 29j jewels beating at 21,600 bph, it delivers a 52 hours power reserve. [seikata-wm-fc1168cb8b2a]

Also known as: Monster, Sportsmatic

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

35mm

Case Thickness

10.6mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

80m

Dial Color

Black

Jewels

29j

Frequency

21,600 bph

Power Reserve

52 hours

Year

1971

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