Seiko Cal. 6643 - 778

Seiko 6643-778

The 6643-778 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 6643 caliber with 22j jewels beating at 28,800 bph, it delivers a 58 hours power reserve. [seikata-wm-772a7b09bec2]

Also known as: Samurai, Sumo

Specifications

Movement
Kinetic
Case Material
PVD Black
Case Width
34mm
Case Thickness
12.4mm
Lug Width
19mm
Crystal
Mineral
Bezel
Bidirectional
Water Resistance
70m
Dial Color
Navy
Jewels
22j
Frequency
28,800 bph
Power Reserve
58 hours
Year
1974

Related Models

seikata-wm-772a7b09bec2