Seiko Cal. 5664 - 855

The Seiko 5664-855 represents an important milestone in Seiko's 1977 lineup. Powered by the 5664 caliber with 20j jewels beating at 28,800 bph, it delivers a 38 hours power reserve. [seikata-wm-9a275f95f379]

Also known as: Bullhead

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

35mm

Case Thickness

15.0mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Black

Jewels

20j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1977

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