Bought this years ago, obviously it is from the 30's. Seller said it is from 1937. Is it? Also, is this a professional mic, used in broadcast, or is this a toy of some kind?

It says "Shure" so it's not a toy. Can you see the model number well enough?

Looks like four springs are missing.

It says "Model 3B" and "Serial A8617."

Well, I did a little research, and found this - the Internet is really amazing: https://shure.custhelp.com/ci/fattach/get/27962/0/filename/1936.pdf