Seiko Cal. 6660 - 523

Released in 1978, the Cal. 6660 with design code 523 was part of Seiko's domestic market collection. With its 21mm lug width and 15.8mm profile, it sits comfortably on most wrists. [seikata-wm-9ea35bb4053a]

Also known as: World Timer

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

34mm

Case Thickness

15.8mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Blue Sunburst

Jewels

19j

Frequency

28,800 bph

Power Reserve

48 hours

Year

1978

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