In discovering that it may very well have been N.J. Rabensburg who created what we call a "Brill" today, that same article (based on a 1950s interview with Rabensburg [d. 1961], wherein it was Texas Ranger Hughes who worked with NJR and not Ranger Trimble who worked with AWB to create it), it's stated that Rabensburg's were only marked with the owner's initials on the cuff.
rabensburg (2).jpg
And lo and behold, in Jerry Burke's article "Leather Quick . . ." in the '97 Gun Digest, is what appears to be Trimble's holster (the initials on the cuff could be L.E.T. for Lee Elisha Trimble as stated in the article) -- which would make the holster, not a Brill, but a Rabensburg (again, because of the intials).
Would I love to find out where this holster is now! Burke himself has eluded me so far but I have a feeler out.