Presto Recording Corp 1930's carbon microphone

This microphone was picked up at a flea market many years ago for less than $1.  There isn't much information about it online. I know it's a carbon mic that apparently came with a "j5" recording cutter.  The cutter was released somewhere between 1930 and 1937 and is one of the first cutters that were available.  So I atleast have an close estimate as to when the microphone was manufactured.  The cable had started to fall apart so it needed to be removed.  I believe that it still holds value in it's current state.  Any help at all would be greatly appreciated.

Fair