Seiko Cal. 6643 - 540

The 6643-540 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 6643 caliber with 35j jewels beating at 28,800 bph, it delivers a 46 hours power reserve. [seikata-wm-c96a56a1ecf6]

Also known as: Silverwave

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

38mm

Case Thickness

11.8mm

Lug Width

22mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

190m

Dial Color

White

Jewels

35j

Frequency

28,800 bph

Power Reserve

46 hours

Year

1979

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