Seiko Cal. 5639 - 722

The Seiko 5639-722 represents an important milestone in Seiko's 1977 lineup. The Inner Rotating bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-9df6c177b42f]

Also known as: Bullhead, Rally

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

43mm

Case Thickness

9.9mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

Cream

Jewels

32j

Frequency

28,800 bph

Power Reserve

68 hours

Year

1977

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