The only reason you think they are Snell's is because of the badge on the grille, correct? Doesn't take much effort to swap grills from one speaker to another, if they are close to the same size and will work.
If it were me, I'd remove the woofer and see if there are any markings or numbers on it and maybe check the inside walls for any type of manufacturer name or symbols.
If it were me, I'd remove the woofer and see if there are any markings or numbers on it and maybe check the inside walls for any type of manufacturer name or symbols.