Seiko Cal. 6640 - 719

The 6640-719 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6640 caliber with 35j jewels beating at 36,000 bph, it delivers a 47 hours power reserve. [seikata-wm-24a9affef432]

Also known as: Navigator

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

10.3mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

90m

Dial Color

Green

Jewels

35j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1970

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