Seiko Cal. 5668 - 905

Released in 1976, the Cal. 5668 with design code 905 was part of Seiko's domestic market collection. With its 21mm lug width and 12.1mm profile, it sits comfortably on most wrists. [seikata-wm-34fb787bf70b]

Also known as: Helmet, Sportsmatic

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

12.1mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

30m

Dial Color

Navy

Jewels

25j

Frequency

28,800 bph

Power Reserve

55 hours

Year

1976

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