Seiko Cal. 6645 - 940

Seiko 6645-940

The 6645-940 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6645 caliber with 23j jewels beating at 21,600 bph, it delivers a 46 hours power reserve. [seikata-wm-d986a25b6c41]

Also known as: Sumo, Tuna

Specifications

Movement
Hand-Winding
Case Material
Stainless Steel
Case Width
35mm
Case Thickness
11.6mm
Lug Width
20mm
Crystal
Acrylic
Bezel
Coin-Edge
Water Resistance
200m
Dial Color
Burgundy
Jewels
23j
Frequency
21,600 bph
Power Reserve
46 hours
Year
1988

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seikata-wm-d986a25b6c41