I am not an expert in identifying stamps, however, I personally check every perf, watermark, type, secret mark, etc. on each of these stamps. Please let me know if you find otherwise, I do not want to misrepresent something and will end/revise the listing. It's only me creating these listings, so I may make a mistake! If an item you've purchased has been identified as a different Scott # by PSE (or another reputable certification service), and is of less value, I will refund you and pay for return shipping. If it has a higher value, it's your lucky day! If you would still like to return it, I will still pay for return shipping. Certificates must be included with returns.