Posted By:
Paul SThis is a color printing error, where some of the cards have a slate/gray background. It's pretty rare, especially in the high numbers 145-240 -- such as Snider. We had a thread about this here not too long ago: here's a link to one with the Schoendienst: sorry about the long link:
http://www.network54.com/Forum/579392/message/1186714693/last-1186878677/1949+Bowman+Set+a+Favorite