This is a Buffet Crampon R13 Bb clarinet in silver (not nickel) plate.  S/n 207XXX makes it 1980, a sought-after period in Buffet history known for its warm, dark tone.  It is in excellent condition:  no chips, cracks, or repairs; tenons nice and square with no wobble between joints.  Plating about 99.9% with little if any wear at all. Includes a screwdriver, vintage Buffet one-up, three down mouthpiece on a Chedeville blank in a C facing, and Buffet cap and ligature.  All in the slimline Buffet pouchette case with a zippered case cover.