I appreciate all the info guys. I am curious as to find out how old it is. Is there a way or a good guess? I searched the net for hours yesterday and found nothing on dating it.

I have an old clarinet i need to find out information on before i sell it. if some of you experts will chime in i would appreciate it. I know NOTHING about horn instruments so pardon my inexperience.
I know my wife had it redone back about 15 years ago and its been in the case in the house ever since then, i cant find any flaws other than the reed is missing so i cant play it. I don't know what key it is or anything like that.
It says R. Malerne Professional on it and the serial number on both sections are D2113
Thanks for your help.