Lot
4190 
Canal Zone, Cover Balance, 1917-50, of 16 better covers; includes #39+41 registered use, #49 use to Puerto Rico - N.Y. and returned, #50 solo registered #60 (3)+63+U2 combination, #C2+102+U0 airmail use, #O9 solo usage, #CO2 overprint variety on cover (position 49) with normal solo use, also six scarce postage due usages including combination and block; worth review. Estimate $300 - 400.
Realized: $550