Seiko Cal. 6688 - 309

The Seiko 6688-309 represents an important milestone in Seiko's 1966 lineup. With its 20mm lug width and 10.6mm profile, it sits comfortably on most wrists. [seikata-wm-ee4162f9fe92]

Also known as: Sportsmatic, Crown

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

35mm

Case Thickness

10.6mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

White

Jewels

24j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1966

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