MACAO, 1911, 5a on Half of 10a
Slate Blue, Unsevered Pair (160b). Complete stamp with bold red
overprint, fresh color, centrally-struck "28 Mai 12 Macau" cancel leaves
surcharge and design clearly visibleVERY FINE. AN EXCEEDINGLY RARE USED UNSEVERED PAIR OF THE FIVE-AVO KING CARLOS ISSUE WITH RED SURCHARGE. ONE OF THE GREAT RARITIES OF MACAO PHILATELY.
Scott lists but does not price the entire stamp in either unused or used condition (Image)