Stamp Glossary "P".

 Pair of Stamps  Two unseparated stamps, joined horizontally or vertically as originally issued.

  Pane  Part of a sheet of stamps, usually separated by �gutter� margins.

  Paquebot  (�Packet Boat�).  Term given to letters posted on board ships at sea and to the form of postmark used.

  Paper Error  Stamps printed on a paper of the wrong colour or type than was actually intended.

  Parachute Mail  Messages that have been dropped by parachute usually onto remote areas or small islands.

  Patriotic Cover   Unofficial envelopes printed and used during the American Civil War, bearing patriotic pictures and slogans.

  Pen-cancelled  Stamp officially cancelled or postmarked using a pen and which has been postally used.

  Perforation  A series of holes punched between stamps in the sheet to ease separation. 

  Perforation Error  Stamps perforated of a different gauge than that specified for the issue.

  Phosphor  Stamps are overprinted, inked or impregnated with phosphorescent or �fluorescent� substances for use in electronic letter-facing and postmarking machines. 

  Pigeon Post  The first official pigeon post was inaugurated during the Franco-Prussian War of 1870-2. Microfilmed messages were carried by pigeons in sealed tubes. In modern times pigeons have been used armed forces, especially in time of war; also, other unofficial services are in use from time to time, items carried being of a �philatelic souvenir� nature.

  Plate-numbers  Numerals and/or letters inscribed on sheets of stamps, usually in the margins at the foot or sides, indicating the plate or plates used in the printing of the stamps on a flat-bed press. (as opposed to a rotary press-see �Cylinder-numbers�). 

  Plate Proofs  Plate-maker or printer impressions from the plate, etched cylinder or �stone� before printing commences. 

  Postage Due Stamps  Used by the post office to frank postal articles for the sums to be collected on delivery of unstamped letters, or those which are insufficiently prepaid.

  Postal Fiscals  Fiscal or revenue stamps authorized for postal use.

  Postal Forgery  Forged stamps used to defraud the postal authorities.

  Postal Stationery  All forms of postal envelopes, cards, wrappers etc. which have impressed or imprinted stamps.

  Postmark  Any mark, handstruck, machine-applied or in manuscript form, used on postal items in order items in order to cancel the stamps and/or record the date and origin of their transit through the mail services. (see Cancellation).

  Pre-Stamp Cover   Covers that were used before the advent of stamps.

  Printer�s Waste  Defective, malformed or misprinted stamps which are normally discarded and burned by the printer.

  Private Controls  Inscriptions overprinted on stamps or printed on the backs of stamps by private firms or instituitions to prevent unauthorised usage or prevent theft from their stocks of postage stamps.  

Propaganda Labels  Labels, which are pasted on the letters. In the text contain the political slogans (Finlandish lables against Tcar Russia politics1900, Balticum lambles against USSR, USSR propaganda lables ).

Propaganda Stationary  It was used in USSR as printed slogans From the obverse and return party of post envelopes.

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Barnaul,Russia