Various types of covers
Article Abstract:
The two main classifications of first day covers are commercial and philatelic. Specific covers and cover themes are described. Information about collecting covers is presented to aid collectors.
Publication Name: Stamps
Subject: Hobbies and crafts
ISSN: 0038-9358
Year: 1993
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Watermarks
Article Abstract:
Watermarks on postage stamps can be detected with various methods, including the use of a blend of chemicals. Watermarks are not always easily discovered.
Publication Name: Stamps
Subject: Hobbies and crafts
ISSN: 0038-9358
Year: 1992
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