50's light 12. Picked it up after winning the auction for $230 shipped. It was a satin brown color when I got it however my hunch from blowing up the pics paid off and the rust was a very fine thin even layer with a lot of blue left unde r it. Polishing with Plastx and then Hoppes on soft cotton for a c ouple hours cleaned the rust off. The gun is an aged satin silver/grey but not bad. This is my 2nd A5, the first is a 1925-26 16g.