[Hallicrafters] Microphone element identification assistance.

[Waldo Magnuson]

I was looking through my "stuff" and found a microphone element.  It is 
MC320.  It is just under 2 1/2 in. dia. and 3/8 in. thickness with a 
gold diaphragm with a thin cotton covering.  A small label is stamped 
5-64 and says Astatic Corp.  It appears NOS.  I don't know what 
microphone it is intended for but I have an Astatic Corp. Mod. D-104-C 
(Lollypop) microphone.  Can someone familiar with microphone elements 
tell me if it fits my D-104-C?    If it is intended for some other 
microphone it will be really, really cheap to someone who can use it.
73,  Skip Magnuson  W7WGM