Mexico, Covers, 1903-1945. Interesting selection of items, featuring 1914 example from Dead Letter Office (Rezagos) with various markings front & back and tied post office seal for opened mail; several post cards c.1903 with Weather Forecast "Flag" Cancels, along with writeup by Alfredo Basurto on the subject which appeared in American Philatelist; also Postal Tax stamps used on cover; attractive advertising covers; slogan cancellations, etc; please inspect. Estimate  $100 - 150. $0