 
                            
                    Auction: 16USA - The Frederick R Mayer Collection of Costa Rica                                                                          
                    
                    Lot: 70
                
                    
                        #1, 1863 1/2r Blue, single centered a bit top top, deep rich color, tied to May 26, 1871 folded letter from Puntarenas to San Jose by barred numeral postmark, with unusual and very rare four-ring target cancel (18mm wide) at top center, this being one of only two recorded covers bearing this curious marking, fine and attractive.   Estimate US$ 450-525                        
                                            
                
                    
                        Sold for                    
                        
                        
                        $1,700