Actually I do have some chips from minnesota with canadian funds chips. Those I've been very interested is those from Sault-Sainte Marie (USA) casino chips. I find very interesteing that way of managing currency directly into a casino. I never went to such casino but it must be interesting to see in action. I've always been fasinated about the dynamic of border cities interaction. As myself grew up in a city just a river away from a tiny town in nothern Maine. It's a very different reality that most USA citizen understand. Some example: due to the currency exchange: american were coming buying goods in canada cause the value of their money worth more and they don't have many store in nothern of Maine compare to Edmundston. (Canada) but in other hands many canadians were gettings some gasoline across cause it's cheaper in Madawaska (USA). So it's a win win situation for both economy.
There is so much volume of exchange that many gas station have some pump dedicated only for canadian so it's mesuring in litre and the money showing is in canadian money and they spoke in french. A matter of fact the county of arrostook (Maine) is the most % of french speaking american citizen. Long time ago they divide both our country with st-john river cutting a french community. So that's why we still have families link. And so as many many usa-can border cities. The funniest one is detroit. Detroit was establish by french. Detroit mean strait in french which the city sit on A strait.