Seiko Cal. 6640 - 280

Seiko 6640-280

The 6640-280 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6640 caliber with 29j jewels beating at 28,800 bph, it delivers a 39 hours power reserve. [seikata-wm-8873dce0b975]

Also known as: Bellmatic, Arnie

Specifications

Movement
Hand-Winding
Case Material
Two-Tone
Case Width
38mm
Case Thickness
9.9mm
Lug Width
18mm
Crystal
Hardlex
Bezel
Coin-Edge
Water Resistance
90m
Dial Color
Black
Jewels
29j
Frequency
28,800 bph
Power Reserve
39 hours
Year
1970

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seikata-wm-8873dce0b975