Dale wears a Mack truck hat for most of the series. In the episode The Final Shinsult (^#2.8), when Dale and Cotton are looking at in the closet the top shelf of the closet is filled with a bunch of the hats.
The museum tour guide says Mexico will receive a check for the original cost of Santa Anna's artificial leg - $1300.00 American. That is equal to about $44,014.79 in 2023.