Seiko Cal. 6639 - 248

The Seiko 6639-248 represents an important milestone in Seiko's 1987 lineup. The Rotating bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-87e6502b58c5]

Also known as: Sumo

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

41mm

Case Thickness

9.8mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

140m

Dial Color

Black

Jewels

19j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1987

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