Seiko Cal. 5640 - 906

The 5640-906 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 5640 caliber with 22j jewels beating at 36,000 bph, it delivers a 61 hours power reserve. [seikata-wm-2f22236cc1a8]

Also known as: Tuna

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

42mm

Case Thickness

9.8mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Champagne

Jewels

22j

Frequency

36,000 bph

Power Reserve

61 hours

Year

1994

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