Winnipeg 1904 dominion of Canada medal

I have two dated this one is the one in ve seen a few times the other I cannot seem to locate another even close to it how do I go about finding info on something I can’t find ?

Link to the item. So other will not have to look it up

Medal - Edward VII (Dominion of Canada Exhibition) - Canada – Numista

Looks like there are medals for several years and in different compositions. 

1906 Canada Dominion Exhibition Gold Medal Awarded to the American Tobacco Company. Uncirculated. Original Box and Certificate Included. — Jacob Lipson Rare Coins

453 - Canada. Dominion of Canada Exhibition Award Medal, undated (ca....

1908 DOMINION EXHIBITION CALGARY ALBERTA TOKEN COIN MEDALLION MEDAL CANADA | #1799301216