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 / Roulettings

Rouletting Error: philatelic term for a deviation caused by a rouletting error

Missing Rouletting: postage stamp caused by an error without rouletting at all sides

Partly Missing Rouletting: postage stamp caused by an error with missing rouletting at one or more, but not at all four, sides

Pair With Missing Rouletting in Between: pair caused by an error with missing rouletting in between caused

Double Rouletting: postage stamp caused by an error with twice rouletted at all sides

Partly Double Rouletting: postage stamp caused by an error with twice rouletted at one or more, but not at all four, sides

Rouletting Size Error: postage stamp caused by an error with a different number of rouletting elements