Unless you look at the 99DE and 99PE as glorified DL's. They share many of the same features.. just change the checkering and engrave the receivers.
OK.
I really don't know if the 99CE should be considered a latter day 99PE or not.. obviously the patterns are similar. Just thought I'd throw that out there.
But the 75th Anniversary was built on a 99E receiver chassis, and I think it's pretty clear the 99DE/99PE were built on a 99DL base design. 99's evolved from beginning to end, not too many just "popped" out as a brand new design.