Greenberg's Guide has a pretty extensive section on the comic marbles, how they were made ,etc. and it looks like 1933 tiime frame - but I'm sure you knew that.
Just for information, here is a picture of 13 different Peltier 'Novas' that Bob Block got from Gino Biffany in June 2003 (supposedly all the varieties). Gino is one who knows Peltier well.
I couldn't find a WL on any of my 'coloured' or 'Empire Made' marble bags. Haven't seen that one before. I do have a box like the one you show, Bill - there's been a few around.
Last year at the IAMC Show in Tacoma. Smitty had some of the real St. Mary's and the 2000/01 remake. The real are on the left and the repros on the right. Gives you an idea of the color difference.