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                Perforation-assisted identificationAlready know the stamp, country or SG reference? Add its measured perforation to narrow possible catalogue matches and help distinguish perforation varieties.Try UPA’s Digital Perf Reader ↗
                
                                                            Measured perforation
                    
                    Use this after identifying or searching for the stamp. Perforation is treated as one identification characteristic, not proof of identity or authenticity. Only perforation details explicitly recorded in UPA catalogue descriptions are matched.
                
            

            
                
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                    2
                    lots found                                            UPA103
                                    
                                    Catalogue closes October 6, 2026
                            

                            Related-lot discovery: showing stronger factual matches to Lot 17828. 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 17831
            
            
                
                    Russia                    U                                    
                                    Related lotRelated to Lot 17828 · Same country / area · Imperforate
                                                
                    
                    
                                                
                        Ask a question about Lot 17831
                        
                        Answers separate UPA catalogue facts from general philatelic guidance.
                    
                                    
                                Air Force Exhib. Mini sheet imperf, 165x90mmvery fine & fresh cto used.
                                    
                        Philatelic terms
                        
                                                            
                                                            
                                                            
                                                            
                                                    
                                                    
                                U — Used
                                A stamp that has been used, normally evidenced by a postal or fiscal cancellation.
                            
                                                    
                                SG — Stanley Gibbons
                                The Stanley Gibbons catalogue reference used to identify and catalogue stamps.
                            
                                                    
                                SG value — Stanley Gibbons catalogue value
                                The catalogue value quoted from Stanley Gibbons. It is not the same as the UPA auction estimate or a guaranteed selling price.
                            
                                                    
                                imperf — Imperforate
                                A stamp produced without perforations separating it from adjoining stamps.
                            
                                                General philatelic guidance — separate from the UPA catalogue description.
                    
                                
                    Date
1937
                    SG
MS742b
                    SG value
£275.00
                
                
                    
                        Estimate
                        £98.00
                    
                    
                        
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                                    UPA
                                Lot 17834
            
            
                
                    Russia                    MH                                    
                                    Related lotRelated to Lot 17828 · Same country / area · Imperforate
                                                
                    
                    
                                                
                        Ask a question about Lot 17834
                        
                        Answers separate UPA catalogue facts from general philatelic guidance.
                    
                                    
                                Josef Stalin mini sheet m.m. Small thin to right hand side and imperfections to reverse.
                                    
                        Philatelic terms
                        
                                                            
                                                            
                                                    
                                                    
                                SG — Stanley Gibbons
                                The Stanley Gibbons catalogue reference used to identify and catalogue stamps.
                            
                                                    
                                SG value — Stanley Gibbons catalogue value
                                The catalogue value quoted from Stanley Gibbons. It is not the same as the UPA auction estimate or a guaranteed selling price.
                            
                                                General philatelic guidance — separate from the UPA catalogue description.
                    
                                
                    Date
1949
                    SG
1563a
                    SG value
£250.00
                
                
                    
                        Estimate
                        £90.00
                    
                    
                        
                                                    Why this lot?
                                                Find similar
                                                                            View / bid