Airmail, 1930 Pan American flight. Franked with U.S. 5¢ coil canceled by "Posted on the High Seas" cancel, additionally franked with Brasil 10,000r U.S.A. Zeppelin overprint + 300r definitive tied by "Recife May 28" Zeppelin cachet postmark, cover forwarded to Pernambuco and received by U.S. Navy Capt Shoemaker and returned to Naval Air Station with date stamp of July 29th on reverse, Very Fine, a very unusual mixed usage. Sieger No. 59E. Estimate  $200 - 250. $0 (Image)