This clarinet is very old and probably needs some care and attention. I’m not a clarinet player or expert but with a little help from google I believe it is a ‘fusion’ instrument - the barrel at the top is branded as ‘Boosey and Hawkes 1010’ but the main pieces with the keys appear to be ‘F Buisson’. The serial number is difficult to read but I believe it is 5279 (the 9 could potentially be an 8 or a 3). It comes in a case with locks branded as ‘Cheney’. It also has a box of reeds, a reed cutter, and some Selmer cork grease.