This is a custom mic from microphone-parts.com.  The body is a mxl 990 purchaced on Ebay for $30.  The guts are a CK12 capsule and rhe 990 upgrade pc board.

This mic reminds me of an old 414 from the 70's.  it is one of a matched pair that I built in 2016.  I highly recommend microphone-parts.com