#8, 1878 5c on 3r Black, small "5" handstamped sideways, boasting large margins all around, cancelled by Asunción c.d.s., an outstandingly fine example of this very scarce stamp; 1993 Holcombe opinion; Scott $550; ex Benítez Ciotti. (Image)

Est. $200-300

1939-43 Overprinted "Specimen" stamps affixed to index pages, comprising 50 values, including popular issues such as "Columbus" and "Paz del Chaco", very fine.

Est. $150-200