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Bottom of the Ninthin the Mastro Classic Collector Auction in June 2005. These cards were in PSA holders labeled as W575's. Hal posted on the thread below saying they were not Koesters.
http://www.network54.com/Forum/thread?forumid=153652&messageid=1119588059&lp=1119719013
And another informative thread...
http://www.network54.com/Forum/thread?forumid=153652&messageid=1124983282&lp=1124994818