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Definition of Perforation gauge
1. Noun. (philately) A device for measuring the number of perforations per 2 centimetre distance along the edge of a postage stamp. ¹
¹ Source: wiktionary.com
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1. Noun. (philately) A device for measuring the number of perforations per 2 centimetre distance along the edge of a postage stamp. ¹
¹ Source: wiktionary.com