Seiko Cal. 6644 - 616

Seiko 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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