This is a Selmer series 10S clarinet and a Selmer recital  they are beautiful clarinets in great condition.
 The A in particular does not play as one would expect however, response tuning and tone are poor.
 These are usually very good clarinets. A quick check reveals that the pads do not cover, they are skin pads which have warped over time.

I am going to repad the top joint with cork pads on all keys which are usually in the closed position.
 The other 2 keys will have traditional skin pads.