Seiko Cal. 5640 - 667

The 5640-667 is a sought-after Automatic piece from Seiko's golden era. Powered by the 5640 caliber with 32j jewels beating at 36,000 bph, it delivers a 69 hours power reserve. [seikata-wm-0f92a870e33e]

Also known as: Bullhead, Bellmatic

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

14.0mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

120m

Dial Color

Green

Jewels

32j

Frequency

36,000 bph

Power Reserve

69 hours

Year

1980

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