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1st Class (D-H)
(page updated: Nov 16/02)
||In virtually all cases, the printer of a PNC stamp can be determined by the presence
of a single letter code at the start of the plate number:|
|(none)||Bureau of Engraving and Printing (Washington, DC)|
|(none)||3M Company (St. Paul, MN)|
|A||American Bank Note Company (Guilford, CT)|
|B||Banknote Corporation of America (Guilford, CT)|
Dennison Security Printing Division (Clinton, SC)|
|S||Stamp Venturers (Richmond, VA)|
|S||Sennett Security Products (Columbus, WI)|
Each coloured number in the plate number designates the plate used for that respective
coloured ink. For example, a plate number of 1111 notes that plate 1 was used for each and
every ink colour. Thus, a plate number of 1231 indicates that
a 2nd plate for the blue colour was used and a 3rd plate was used for the red
A letter at the end of the plate number indicates that more than 9 plates were required for an
ink colour so the numbering began back at 1. That is 1111A means that this is really the 10th
plate for each ink colour.
||Self-adhesive stamps do not have perforations in the normal sense of the term.|
Perforations, on water-activated stamps, result from punching holes through the paper.
When stamps are separated from each other, minute paper fibers will be present.
Self-adhesive stamps are die cut. In some cases the stamps 'touch' each other; in other cases
there is a gap left between stamps.
Three types of die cutting have been used on US coils, as illustrated:
- micro-cut - tiny horizontal serrations
- clean cut
- serpentine - small paper fibers join adjacent stamps
|Square / round corners
||Die cutting at all four corners of a self adhesive stamp can produce either square corners or
rounded corners, as illustrated:|
This is because of the size of coil that the stamp comes from: square corners are from rolls of 100;
rounded corners are from the large-size rolls of 3,000 or 10,000.
Stamps that come with both square and rounded corners include:
H (33c) Hat (3265-66)
33c Flag over City (3281-82)
34c Statue of Liberty (3466-67)
34c United We Stand (3550-50A)
37c Flag (3632-33)
Scott numbers are copyright
Scott Publishing Co.
Values shown (US$)
are from the Trends of Stamp Values published in the June 10, 2002
Linn's Stamp News.
© 1999-2012, 2013 Robin Harris
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