just wanted to add, that there are known reprints of the W504 Brooklyn cards.
it looks like they are a blue tint, and the card stock is different and looks like it has "reprint" on the backs
http://www.ebay.com/itm/1925-UNIVERS...-/200587698935
here is an image of one of the authentic cards I have so you can see what the backs (and card stock) look like.
