Argentina, 1867, Rivadavia, unwatermarked, imperf, 5c rose, ample to large margin, rich bright color, tied by neat Correo Nacional del Rosario handstamp on 1867 folded letter sheet to Buenos Ayres, matching "Correo Del Rosario, 9 Ago, 67" cds, Extremely Fine. Yvert Nos. 5c €1,500 ($2,070). Scott Nos. 15  Estimate $500 - 750. $0 (Image)