Seiko Cal. 6660 - 690

The Seiko 6660-690 represents an important milestone in Seiko's 1987 lineup. Powered by the 6660 caliber with 19j jewels beating at 21,600 bph, it delivers a 71 hours power reserve. [seikata-wm-8ee61299963a]

Also known as: Navigator

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

41mm

Case Thickness

15.1mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

90m

Dial Color

Cream

Jewels

19j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1987

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