New Old Stock Vintage Dark Pink color Bottom Edge Tile American Olean 1950's Retro.  The tiles measure 6x6"  5/16" thick.  I am selling these by the individual piece.  (20 pieces avail.)  I also have some in a lighter Pink. The photo of the certificate American Olean Tile Co. is just to show these tiles were manuf. by them and is not included in the auction.  Good luck bidding.