Many thanks for the reply. Your reference to Breton got me to thinking. I remembered purchasing a book of his many years ago. After searching for hours, I found it. It is titled, "Popular Illustrated Guide to Canadian Coins, Medals &. &." by P. N. Breton. It was published in Montreal in 1912. As you may see in the attachment, the Breton storecard is item # 169 on page 75 and appears to be identical to the LeRoux # 1517a as indicated above.
It seems to me, that the medal that we have remained unknown to Breton as late as 1912. It seems likely that if he had known of it, he would have published it in 1912. It does however, also seem likely, that Breton may have known that the people in charge of the inauguration of Chateaux de Ramezay were considering using the same obverse as his own storecard. He might even have offered the die to them. Perhaps, the die was used along with the new reverse die and a few test strikings were made. If the new medal was rejected, this might account for its apparent rarity. Trust I haven't droned on too long.
If you may have additional information on the medal or if anything about it of interest comes your way, please get in touch on the forum or by email. With many thanks again and with kindest regards,
SRS
lhnumis@bellsouth.net