Seiko Cal. 6665 - 424

The Seiko 6665-424 represents an important milestone in Seiko's 1978 lineup. With its 22mm lug width and 10.7mm profile, it sits comfortably on most wrists. [seikata-wm-7f4952e64dea]

Also known as: Helmet, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

41mm

Case Thickness

10.7mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

170m

Dial Color

Champagne

Jewels

20j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1978

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