Hello guys, Im new here. I read all your comments, also believe a have a 544 scott, Im a computer geek, so just scanned a good know sample of 544, then on another layer match your believe to be the 544 stamp. Match the art perfectly putting yours one on top to the other certified 544 (align just the art the best you can) using the corner as guides. In my case, the perforations match perfectly. I was using a gauge, but couldnt certify 100%. With software Im sure that it does match. As a matter of fact, two of the perforations sides match almost perfect (one lateral and one horizontal).
I made two different scans of both sets, just to make sure, using a well know 544 copy listed on
https://www.theswedishtiger.com/544-scotts.html and overlayed to mine. The results are perfect. My procedure is to digitally create 4 marks on each layered picture, match the art perfectly, then you align moving the perforations mantaining the aspect ratio of the match layers. Im a firm believer that if two best sides matches, then the other two sides must match, at least so you can send it to professionals to certify your stamp. Here is my alinged two stamps. It matches perfectly, even have the same perforation shape. I hope this can help you identify your stamps, from already knowed samples. By the way it measures 19mm x 22.5mm
