Seiko Cal. 6643 - 542

Seiko 6643-542

The 6643-542 is a sought-after Quartz piece from Seiko's golden era. Powered by the 6643 caliber with 36j jewels beating at 21,600 bph, it delivers a 44 hours power reserve. [seikata-wm-9009b8bc4035]

Also known as: Sumo, Arnie

Specifications

Movement
Quartz
Case Material
Stainless Steel
Case Width
37mm
Case Thickness
9.3mm
Lug Width
18mm
Crystal
Mineral
Bezel
Fixed
Water Resistance
80m
Dial Color
Green
Jewels
36j
Frequency
21,600 bph
Power Reserve
44 hours
Year
1993

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seikata-wm-9009b8bc4035