- Perforated Initials (philately)
- Abbreviation: PI
Универсальный русско-английский словарь. Академик.ру. 2011.
Универсальный русско-английский словарь. Академик.ру. 2011.
Postage stamps and postal history of the United States — This is a survey of the postage stamps and postal history of the United States of America (USA).Early postal historyIn the American colonies, informal independently run postal routes began in Boston as early as 1639, with Boston to New York City… … Wikipedia
perfin — [ pə:fɪn] noun Philately a postage stamp perforated with the initials or insignia of an organization. Origin 1950s: from perf(orated) in(itials) … English new terms dictionary