Philatelic Specialties
Research perforations, watermarks, gum, cancels, plate varieties, errors, forgeries, expertizing, albums, and postal rates.
Perforation Varieties
Gauge, compound perforations, roulettes, private perforations, and reperforation.
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Watermarks
Paper designs that distinguish otherwise similar issues.
Open guide →Paper Types
Wove, laid, granite, chalky, tagged, coated, and experimental papers.
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Gum, Hinges and Regumming
Original gum, never hinged, hinged, disturbed gum, no gum, and regumming.
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Cancellations and Postmarks
Town marks, grids, fancy cancels, dates, killers, slogans, and fraudulent cancellation risk.
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Centering and Margins
Design placement, perforation clearance, imperforate margins, and jumbo examples.
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Colors and Shades
Catalog shades require controlled comparison and awareness of fading and chemical alteration.
Open guide →Printing Methods
Engraving, typography, lithography, photogravure, offset, and hybrid processes.
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Plate Varieties
Constant flaws, re-entries, recuts, cracks, double transfers, and plate positions.
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Overprints and Surcharges
Settings, spacing, ink, position, forgery risk, and postal purpose.
Open guide →Inverts and Missing Colors
Major production errors that require exact issue knowledge and expertization.
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Reperforation and Repairs
Added perforations, filled thins, reperforated edges, cleaned cancels, and altered gum.
Open guide →Certificates and Expertizing
What opinions cover, what they do not, and how certificates affect market confidence.
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Catalog Numbers and Cross-References
Scott, Stanley Gibbons, Michel, Yvert, and specialized catalog systems.
Open guide →Kiloware, Mixtures and Box Lots
Bulk material can be fun but should be priced as unsorted common material unless proven otherwise.
Open guide →Inherited and Estate Collections
Preserve albums, labels, certificates, covers, receipts, and collector organization before sorting.
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Postal Rates and Routes
How franking, route, destination, service, and markings create postal-history value.
Open guide →Forgeries, Facsimiles and Fakes
Postal forgeries, collector forgeries, reprints, facsimiles, fantasies, and altered genuine stamps.
Open guide →Specimens, Proofs and Essays
Non-issued or reference material requiring precise status and provenance.
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Albums, Hinges and Mounts
Storage systems should protect gum, paper, perforations, and provenance.
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