Wow! this is getting exciting. Thank you all. Its beginning to look like I'll never know for certain who made the grips in question, but I have some new stuff to offer. Thanks to the awesome WWW I made contact with Bill Rogers and he says that he did not make them. He thought early Guy Hogue. I also contacted Tom Jones at the LAPD academy revolver club. He sent me the following:
Brad I sent this out to the captain of our shooting team and he says unequivocally Hurst.
I contacted Steve Estrada, ,shooting team captain, and about the DEL REY stamp and he replied: I'm thinking.....Model type......Ive asked around, nobody knows. J. Pride says the same.
I had been thinking it was an address but a model/ style makes sense.

Also, as I see, it the fact that Hurst did not mount the right escutcheon in a plug as Farrent did, Hurst's are mounted directly into a hole drilled part way into the inside of the right grip panel, also supports them being Hurst.