Such a variety would lean me towards it meaning an assortment, and I also do not recall Specials being the name of marbles on any of the Peltier inventory sheets I examined??
Having eliminated the bigots and haters from my space I have a wonderful "Band of Brothers" and it seems to grow by the day. I think the mellowing with age has helped a whole lot.
If you really are serious about marbles try very very hard to get to a show, One Saturday at a show will be more marble identification than you can get from many years of reading books.