Seiko Cal. 6640 - 753

Seiko 6640-753

The 6640-753 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6640 caliber with 19j jewels beating at 28,800 bph, it delivers a 45 hours power reserve. [seikata-wm-a9a4567a95d3]

Also known as: Tuna, Silverwave

Specifications

Movement
Hand-Winding
Case Material
Titanium
Case Width
39mm
Case Thickness
14.0mm
Lug Width
18mm
Crystal
Hardlex
Bezel
Coin-Edge
Water Resistance
30m
Dial Color
Green
Jewels
19j
Frequency
28,800 bph
Power Reserve
45 hours
Year
1983

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