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

Knowledge / Errors / Machine Postmarks

Machine Postmark Error: philatelic term for a deviation caused by a machine postmark error

Machine Postmark Colour Error: deviation from the intended machine postmark colour caused by an error

Machine Postmark Typ Error: deviation in the machine postmark text caused by an error

Machine Postmark Design Error: deviation in the machine postmark design caused by an error

Machine Postmark on Reverse: postal shipment with machine postmark on reverse instead on front

Machine Postmark on Two Sides: postal shipment with the same machine postmark on front and on reverse

Partly Missing Machine Postmark: postal shipment with partly missing machine postmark

Vertical Instead of Horizontal Machine Postmark: postal shipment with 90 degrees rotated machine postmark

Inverted Machine Postmark: postal shipment with 180 degrees rotated machine postmark

Partly Inverted Machine Postmark: postal shipment with partly 180 degrees rotated machine postmark

Double Machine Postmark: postal shipment with twice machine postmark

Double Machine Postmark One Inverted: postal shipment with twice machine postmark one 180 degrees rotated