Executone Model EXL Dynamic Microphone
This microphone bears the Executone name, but it was actually made sometime in the 1940's by Turner.  Executone made public address and intercom systems, and they apparently bought microphones from Turner, and put their own nameplates on them.

The model designation appears to be the "EXL".  It is interesting that the model, serial number, and impedance specification were crudely scratched into the nameplate, rather than being stamped.

It is similar in appearance to several models made by Turner, but it doesn't exactly match any that I have found.  The brown crackle painted finish was unique to Executone, and Turner did not sell any microphones with the single 225 ohm impedance of this one.