They sometimes used those ink stamps on custom stamped discs in the mid-late 90's to identify the mold, so the Stingray stamp on a custom stamped disc would have been somewhat common.thanks for the replies. Hope these shots post ok. I studied underneath this disc and found what appears to be a worn down and partially visible patent # and company address raised in the plastic which I think corresponds to innova.
I can't make out all the #s of the patent stamp but have to wonder if the various disc models got their own stamp. (dont mind the strips of tape, this thing is about to explode, like that stuffed animal you loved as a kid until its eyeballs were hanging out etc)
Also the Stingray top back then had this tell that the part that said "Innova Champion Discs Inc" was not very deep and hard to read but the part right below it that said "San Marino, CA" was very clear. You can see that in the tooling on that disc, so the disc clearly is using the Stingray top.
So, nice Stingray.