Seiko Cal. 6643 - 928

Seiko 6643-928

The 6643-928 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6643 caliber with 34j jewels beating at 36,000 bph, it delivers a 69 hours power reserve. [seikata-wm-addc607c432f]

Specifications

Movement
Automatic
Case Material
Hardlex-Coated Steel
Case Width
46mm
Case Thickness
11.7mm
Lug Width
18mm
Crystal
Acrylic
Bezel
Bidirectional
Water Resistance
70m
Dial Color
Cream
Jewels
34j
Frequency
36,000 bph
Power Reserve
69 hours
Year
1970

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