Seiko Cal. 6626 - 310

The Seiko 6626-310 represents an important milestone in Seiko's 1966 lineup. With its 21mm lug width and 12.9mm profile, it sits comfortably on most wrists. [seikata-wm-851d6731bd62]

Also known as: Tuna, Helmet

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

36mm

Case Thickness

12.9mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Blue Sunburst

Jewels

20j

Frequency

28,800 bph

Power Reserve

60 hours

Year

1966

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