Seiko Cal. 5640 - 599

The Seiko 5640-599 represents an important milestone in Seiko's 1978 lineup. Powered by the 5640 caliber with 29j jewels beating at 21,600 bph, it delivers a 43 hours power reserve. [seikata-wm-6592780cd3cd]

Also known as: Bullhead, UFO

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

46mm

Case Thickness

12.9mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

70m

Dial Color

Champagne

Jewels

29j

Frequency

21,600 bph

Power Reserve

43 hours

Year

1978

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