Unfortunately nothing special here. This is a vintage metal clarinet from anywhere in the 1930-1950 range. Not sure who the maker is, but there were literally hundreds of differently "brands" of metal clarinet.
These usually sell for about $40 in unrestored condition and $100 restored. A bit more for silver plated models, but this doesn't appear to be silver.
Topic: Continental Clarinet identification (Read 25 times)