A large and unusual stainless steel automatic "Seamaster" wristwatch, by Omega

A large and unusual stainless steel automatic "Seamaster" wristwatch, by Omega
The circular black dial with luminous baton numerals, luminous hands, sweep centre seconds and date aperture, in large tonneau-shaped case with hooded lugs, the revolving black bezel calibrated for 60 units, with screw down winding crown to the left, to stainless steel Omega link bracelet with sprung action clasp
Dial signed Omega Automatic Seamaster Professional, clasp signed Omega and No. 1247/237