Seiko Cal. 6641 - 356

Seiko 6641-356

The 6641-356 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6641 caliber with 24j jewels beating at 28,800 bph, it delivers a 72 hours power reserve. [seikata-wm-08deacd9064f]

Also known as: Bullhead

Specifications

Movement
Hand-Winding
Case Material
Hardlex-Coated Steel
Case Width
37mm
Case Thickness
15.8mm
Lug Width
22mm
Crystal
Mineral
Bezel
Fixed
Water Resistance
120m
Dial Color
Black
Jewels
24j
Frequency
28,800 bph
Power Reserve
72 hours
Year
1989

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