 
                            
                    Auction: CSS12 - The Philatelic Collector's Series sale                                                                                  
                    
                    Lot: 1621
                
                    
                        1850 (23 Apr.) stampless envelope to Amsterdam (16.6) via Etranger (14.6), on reverse tied by "Hong Kong" double-arch d.s. (Webb type 9); and on front tied by "Paid At Hong Kong" medium-crowned c.d.s. (Webb type 8), very fine. Photo                        
                                            
                
                    
                        Estimate                    
                        
                        
                        HK$4,000 to HK$5,000