Seiko Cal. 6639 - 455

The Seiko 6639-455 represents an important milestone in Seiko's 1968 lineup. The Rotating bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-dd800b99a992]

Also known as: Bullhead, Rally

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

45mm

Case Thickness

14.3mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

50m

Dial Color

Navy

Jewels

19j

Frequency

36,000 bph

Power Reserve

45 hours

Year

1968

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