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Definition of Perf
1. Abbreviation. (philately) perforation or perforated. When followed by a number, eg, ''perf 14'', this indicates the number of perforations per two centimetres. ¹
¹ Source: wiktionary.com
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1. Abbreviation. (philately) perforation or perforated. When followed by a number, eg, ''perf 14'', this indicates the number of perforations per two centimetres. ¹
¹ Source: wiktionary.com