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Foreign Mail / Re: Special US-Mexico Rate After UPU?
« on: June 17, 2017, 11:14:10 AM »
Agree, but this is the first one I've found and have just resumed interest in this stamp after a 25-year layoff. I thought some specialist might know. If no one knows, it probably means the research I did on rates to Mexico was good enough since I could find no such rate. The special rates to Canada earlier in the century are not well-known except to specialists and I thought Mexico might have one like that, too. I do appreciate the trouble you took to post this. Thanks again.