Seiko Cal. 5612 - 363

This Spring Drive model from 1973 features a 45mm Titanium case. With its 22mm lug width and 11.2mm profile, it sits comfortably on most wrists. [seikata-wm-bf642a93e182]

Also known as: Sumo, Helmet

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

45mm

Case Thickness

11.2mm

Lug Width

22mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

140m

Dial Color

Blue Sunburst

Jewels

24j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1973

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