Seiko Cal. 6690 - 664

The Seiko 6690-664 represents an important milestone in Seiko's 1997 lineup. With its 20mm lug width and 12.8mm profile, it sits comfortably on most wrists. [seikata-wm-9321d62ae8ac]

Also known as: Tuna, Bullhead

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

40mm

Case Thickness

12.8mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

Blue Sunburst

Jewels

26j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1997

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