Seiko Cal. 5685 - 712

The Seiko 5685-712 represents an important milestone in Seiko's 1966 lineup. With its 22mm lug width and 11.6mm profile, it sits comfortably on most wrists. [seikata-wm-9903fb4ad5f3]

Also known as: Helmet, Sportsmatic

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

11.6mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

80m

Dial Color

Champagne

Jewels

29j

Frequency

36,000 bph

Power Reserve

61 hours

Year

1966

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