Seiko Cal. 6699 - 531

The Seiko 6699-531 represents an important milestone in Seiko's 1981 lineup. The Rotating bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-35d366574eab]

Also known as: Sumo, Bellmatic

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

41mm

Case Thickness

11.7mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

110m

Dial Color

Silver

Jewels

35j

Frequency

36,000 bph

Power Reserve

46 hours

Year

1981

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