I thought this was just Pan-Pac Expo at first (from the original post). Since it is all expos, I will add this one too.
No there was an interesting post a week or so ago....that featured some items from expos..I though it be fun to see some of better items linked to Expos. Like I saw a very old button graphics very well done colorful of the two women making up North and South America. Unbelievable illustration, color, and the fact it was over 100 years old in great shape. The wooden steam pressed medal like that were sold at the exhibits.
Here's one of my favorite medals from the 1915 Panama Pacific International Exposition in San Francisco. It's a So Called Dollar HK-399, not many were minted in Silver, I heard only 1,000 but idk, for absolute certain! The link is the So Called Dollar reference link! https://so-calleddollars.com/Events/Panama_Pacific_Exposition.html
I hope you will accept my Hudson-Fulton Celebration. They didn't call it an expo but in my eyes it was.
From the World's Columbian Exposition of 1893, I have a circulated but nicely toned half dollar, plus a large-sized guidebook to the Expo: