Seiko Cal. 6639 - 506

The Seiko 6639-506 represents an important milestone in Seiko's 1983 lineup. The Inner Rotating bezel and 44mm case give it a distinctive presence on the wrist. [seikata-wm-b13a191a712d]

Also known as: Rally

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

44mm

Case Thickness

14.2mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Silver

Jewels

22j

Frequency

28,800 bph

Power Reserve

63 hours

Year

1983

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