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For some time I’ve been thinking stamp catalogue index numbers (yes, those running numbers that stamp catalogues use to identify each stamps) and their purpose. I know it sounds a silly topic to bother the mind, but it’s actually very interesting one. The thinking behind catalogue catalog numbering systems is simple – create a straightforward numbering system (that is preferrably consecutive) to identify different stamps of each country/area. But alas, the numbering system should also be unique to avoid possible copyright contradicts with existing numbering systems. And in case of errors, it should have room for extension. And… It’s both amazing and absurd to see how differently the same stamps can be specified in different catalogs. Without a doubt this is a bottleneck that many dealers, collectors and alike have learned to live with. I’m sure many readers of this blog are familiar with rules like “use Scott numbers for […]

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All original content and images of this blog is under copyright protection; any kind of reproduction of full contents without permission of the owner is hereby denied. All Rights Reserved © Keijo Kortelainen, 2009-2016. All photos of stamps in this blog are enlargements or reductions of original stamps from private collection of author of the blog (unless otherwise stated). The designs of stamps and postmarks are copyright of issuing postal authorities and their designers. The comments / discussion on this blog are copyright of their retrospective authors, and represent the opinion of their authors. When submitting content of any type to this Website, you agree that you assign to this Website and its successors perpetual and unlimited license free of charge to host, store, publish, reproduce, publicly display or otherwise use any content and materials of any type provided or contributed by You. Catalog numbers (Scott, Michel, SG etc) are the copyrighted property of their publishers. | See our privacy policy