Mexico, Airmails Collection, 1950-1977, comprehensive study of the 1950-52 designs, with its many varieties, watermarks, shades, papers, etc; many of the better numbers including C213 (3), C197, C217 (3 shades), C286, C249, C298 and many more lesser catalog value, some unlisted in Scott but present in Sanabria; generally F-VF or better, please inspect for proper valuation, o.g., hinged or mostly never hinged. Estimate  $250 - 350. $0