Lot 1009
20 centavos green and 5 centavos red (small perforation faults) tied by experimental duplex "VALPARAISO MAY 2" (used between October 1876 and February 1878) to cover endorsed "Via Panama y Hamburg" to Germany, franked according to the postal treaty with Germany effective from January 1st 1875; only a few of these treaty mail covers have been recorded
