Stamp Guides and More A magnifying glass and a perforation guide are important stamp collecting tools. Several stamps issued in Nineteenth Century were printed with minimal alteration in design and perforation.
I asked questions about a stamp I wanted to identify; I couldn't tell the country. She showed me how to recognize it, and together we looked it up in a stamp finder. Also, we worked with how to read the perforation guide I brought with me.
Perforation guide: plate marking printed a sheet to help registrations during the printing process.
Perforations (Perf.): lines of small holes placed around stamps to provide an easier means of separation.
 See also: Stamp, Perforation, Airmail, Stamp Collecting, Eagle
  
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