Here is what I know 

This Bb Clarinet is an antique and I can not find any info on the "k" serial number

There are no cracks anywhere except the bell which has numerous cracks shown in the pics.

The stamps in the wood are as follows:

H. Selmer 

Paris

Brevete

R.C.C.  435

S.G.D.G.

SN# K3324 

It will need a total overhaul but the sprins and keys seem fine...definitely needs pads and corking.

please note; The handling fee is for shipping insurance only and local pickup is always welcome in NJ