Introduction	Additional Stamp Impressions		A T Ms	Burelages	Cliche Cancellations	Cuts	Design Prints	Die-cuttings	Embossings	Form Prints
Gums	Hand Postmarks	Ink Jet Cancellations	Lumines- cences	Machine Postmarks	Margin Prints	Meter Stamps	Overprints	Pencancel- lations	Perforations	Press Marks
Print Substrates	Postal Stationeries	Punches	Reverse Prints	Roulettings	Second Overprints	Separate Productions	Se-tenants	Sheet Stamps	Silk Threads	Stamp Booklets
Stamped Envelope Overprints		Stamp Impressions	Third Overprints	Tress Rosettes	Watermarks	Others

Knowledge / Errors / Separate Productions

Separate Production Error: philatelic term for a deviation caused by a separate production error

Pair Not Separated: two hanging together separate production postage stamps not cut separated caused by an error

Separate Production Stamp With Size Difference: larger or smaller separate production postage stamp caused by an error