Seiko Cal. 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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