[Howe’s Hunter]

I've recently made contact with a gentleman who has been the source of one of Howe's old cards, and is currently holding another for me, but in our latest exchange, he mentioned that he had sold a complete T206 set in a Mastro auction in 2006 that had several, or maybe a lot, of the cards with the stamp on them. I questioned him whether is might have been 2008, when there was the set that had 50 of them, but he insists that it was 2006. Now, I know a catalog listing wouldn't have every card pictured, and a complete T206 set wouldn't even list every card, but it might say how many cards in the lot had the stamp, and might mention if any of the major cards had the stamp. Anyone on board have old catalogues like these, or know of an online site that has them? Thanks.