Seiko Cal. 6642 - 658

Seiko 6642-658

The 6642-658 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6642 caliber with 32j jewels beating at 21,600 bph, it delivers a 41 hours power reserve. [seikata-wm-9039c52c185f]

Also known as: Sumo, Sportsmatic

Specifications

Movement
Hand-Winding
Case Material
PVD Black
Case Width
40mm
Case Thickness
9.9mm
Lug Width
20mm
Crystal
Sapphire
Bezel
Inner Rotating
Water Resistance
30m
Dial Color
White
Jewels
32j
Frequency
21,600 bph
Power Reserve
41 hours
Year
1982

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seikata-wm-9039c52c185f