Hi, Fred. In this case you're in the right church, even if perhaps in the wrong pew.
That said, it would depend on exactly when your gun was shipped. Others in your immediate serial number range appear to have shipped in "earlyish" 1971 when there's a good chance they were still shipping the occasional older "blackbird" grip panels. If it were shipped considerably later, it's more likely it came with the "squashed chickens". Unfortunately, we cannot obtain data from the factory on exactly which components were furnished on any particular gun.
I'm prepared to be corrected by more experienced members.
At any rate, you have a nice Old Model there, particularly with the matching 9mm cylinder. Enjoy.
You will note from the listing on page one that your gun was almost certainly shipped before the long "run" of duplicate D-marked guns.