Seiko Cal. 6690 - 539

Released in 1976, the Cal. 6690 with design code 539 was part of Seiko's domestic market collection. With its 20mm lug width and 10.7mm profile, it sits comfortably on most wrists. [seikata-wm-a3705eb191ba]

Also known as: Silverwave, World Timer

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

39mm

Case Thickness

10.7mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

110m

Dial Color

Navy

Jewels

20j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1976

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