In Baldwin's Moser Artistic Glass it says, "From approximately 1850-1930, most Bohemian crystal produced was based on a formulation developed at Meyr's Neffe...After the opening of the Meierhofen works, Moser engaged in the develpment of improved formulations of Bohemian crystal." So it's secodary materials I got the information from. Here "crystal" is used in the American sense, meaning colorless glass. It doesn't mean that the formula used by other companies was identical to that used by Meyr's Neffe, but evidently they were the first to develop the potash-lime glass commonly used in Bohemia from 1850; before then it was apparently a lime glass without much in the way of soda or potash.
I stand corrected, the bull on the tumbler on the Wolf site isn't relevant.