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                    1
                    lot found                                            UPA103
                                    
                                    Catalogue closes October 6, 2026
                            

                            Related-lot discovery: showing stronger factual matches to Lot 18733. Distinctive philatelic features are prioritised over generic similarities such as format, condition or date; results are ranked locally from the full current UPA catalogue.
            
                            
                                                    
            
                                    
                                Lot 18732
            
            
                
                    Spain                                                        
                                    Related lotRelated to Lot 18733 · Same country / area · Similar period
                                                
                    
                    
                                                
                        Ask a question about Lot 18732
                        
                        Answers separate UPA catalogue facts from general philatelic guidance.
                    
                                    
                                50m pale brown 'Provisional Government of Spain' ISABELLA issue IMPERF COLOUR TRIAL on white paper. A fine example. 2021 RPSL certificate accompanies stating 'is a contemporary colour trial'. Very scarce. (As SG 146)
                                    
                        Philatelic terms
                        
                                                            
                                                            
                                                            
                                                    
                                                    
                                SG — Stanley Gibbons
                                The Stanley Gibbons catalogue reference used to identify and catalogue stamps.
                            
                                                    
                                imperf — Imperforate
                                A stamp produced without perforations separating it from adjoining stamps.
                            
                                                    
                                provisional — Provisional issue
                                A stamp or issue adapted for temporary use, often by overprinting or surcharging existing stock.
                            
                                                General philatelic guidance — separate from the UPA catalogue description.
                    
                                
                    Date
1868
                                                        
                
                    
                        Estimate
                        £54.00
                    
                    
                        
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