Seiko Cal. 5661 - 226

The Seiko 5661-226 represents an important milestone in Seiko's 1967 lineup. With its 18mm lug width and 8.5mm profile, it sits comfortably on most wrists. [seikata-wm-60da3da86ca6]

Also known as: Monster, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

45mm

Case Thickness

8.5mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

180m

Dial Color

Black

Jewels

31j

Frequency

21,600 bph

Power Reserve

47 hours

Year

1967

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