Hallo Paul, looks like a good buy for the price. Having lived in charmany for 30 years, I'd agree with S'licker on the Ost bloc, either East Germany or Tschecheslovaki origin, - gold laquer and nickel keys, the big ring between the body and bell should be a give-away and the sling ring, the spatulas on the RH pinky look a bit oversized to my eyes. I'd say Eastern Europe, mid-eighties, solid horn and if it plays good you got a deal.
Check out saxpics.com - might give you some clues. greets - spike