EARLY SOUTH AMERICA IMPERF. GROUP INC. MEXICO COVER: Two stock pages with the selection of imperf. types inc. Buenos Aires 1p blue used (2), Corrientes (3c) blue and (3c) rose-lilac; Argentina 1863-64 5c rose (shades) strip of 3 on piece and 2 singles each on piece (SG 10), 1867 'Rivadavia' 5c carmine-rose imperf. no wmk. with appearance of unused, probably SG 24 (expert/dealer marks on reverse) and 10c green imperf. with wmk. used, probably SG 14 (£1,300) but without guarantee; Chile imperf. "Colon" used group of 5c (4) & 10c (3) in various shades. Lot also includes Mexico 3 Mar. 1858 local EL bearing 2r green. Fine examples throughout. (18 plus a cover) Cross Reference: ARGENTINA, CHILE, MEXICO (Image)