My father came from Rouses Point in upstate New York along the Canadian border. We would visit his kin there and back then you could walk across the border without any check point. The exchange rate floated but it was always right around one to one. It might fluctuate a penny either way from day to day. When that happened the side that was down a cent would gobble up as many of the other's dollars and the country with the more valuable currency would refuse the other's. I always thought that was funny, but I guess back then a penny was really worth something.