Seiko Cal. 6640 - 656

The 6640-656 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 6640 caliber with 26j jewels beating at 28,800 bph, it delivers a 46 hours power reserve. [seikata-wm-b1268024f4b9]

Also known as: Monster

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

35mm

Case Thickness

11.1mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Cream

Jewels

26j

Frequency

28,800 bph

Power Reserve

46 hours

Year

1987

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