Seiko Cal. 6641 - 990

The Seiko 6641-990 represents an important milestone in Seiko's 1981 lineup. The Rotating bezel and 38mm case give it a distinctive presence on the wrist. [seikata-wm-6b8ae6cf46f8]

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

9.3mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

80m

Dial Color

Champagne

Jewels

20j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1981

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