Hey all. I have a Selmer Paris bari with no model designation engraved on it. The # is 8436 which places it in the modele 26 range or maybe even a modele 28. And what exactly is a largebore? There's absolutely nothing indicating which model it is. The more I research, the more confused I get. And I noticed today there is another number, 1973, engraved below the low D key. What could THAT mean? I appreciate any help?