Seiko Cal. 6640 - 755

The 6640-755 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 6640 caliber with 26j jewels beating at 36,000 bph, it delivers a 42 hours power reserve. [seikata-wm-c89a65eabf7e]

Also known as: Navigator

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

15.6mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

50m

Dial Color

Silver

Jewels

26j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1981

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