U.S. 1938 PUERTO RICO SEMI-OFFICIALS, SANABRIA # 505, 506, 507 FIRST FLIGHT CVR.

UP FOR BID IS A VERY ATTRACTIVE FIRST FLIGHT COVER FLOWN FROM PUERTO RICO TO NEW YORK. THIS COVER IS POSTED WITH U.S. # C10 AIR MAIL PLUS TWO SEMI-OFFICIAL AIR MAIL STAMPS UTILIZED BY AEROVIAS NACIONALES FOR MAIL FLOWN FROM PONCE, GUANICA AND MAYAGUEZ TO SAN JUAN. THE SEMI-OFFICIALS ARE LISTED IN THE SANABRIA CATALOG OF WORLD AIRMAILS AS # 505, # 506 AND # 507. ADD THIS SCARCE COVER TO YOUR COLLECTION. PAY-PAL NOW ACCEPTED FOR PAYMENT. ALL STAMPS AND COVERS ARE MAILED IN SECURE, STIFF MAILERS. POSTAGE WILL BE RE-CALCULATED FOR MULTIPLE PURCHASES.