Lot 40123 – 1866, 500r orange, plate colour proofs on definitive paper in clock of 14

1866, 500r orange, plate colour proofs on definitive paper in upper right corner-sheet horizontal block of 14, characteristic detailed impression with ABN marginal imprint in English and Spanish at top, and part of a third one in Spanish at right, some usual ageing and horizontal crease between stamps; a spectacular showpiece of this denomination which is very rare in large plate-proof multiples on this paper; ex Chusyd and Dr. de Amaral Machado.