Auction: 166 - The Philatelic Collectors' Series Sale
                    
                    Lot: 269
                
                    
                        Unitrade #18P, 1859 12½c Yellow green, plate proof on India, mounted on card, impressive bottom right corner sheet-margin block of twenty (4x5), pos. 57-60/97-100, showing "American Bank Note Co. New York" imprints at right and bottom, ample to large margins on the other two sides, numerous re-entries annotated by Ralph Trimble, extremely fine and handsome. Cat. value $7,000
                        
                                            
                
                    
                        Sold for                    
                        
                        
                        $1,200