31. PerfinsPerfins – Stamps with initials perforated in them. Mostly used by private companies or government departments for security reasons. Government use has been mainly for ‘OHMS’ or ‘OS’ but was also...
32. Part PerforatedPart Perforated – stamps only partly perfed due to some fault in the perforating procedure. Such stamps might have one or more sides partly or completely imperf. The term wo...
33. Nibbed PerfNibbed Perf – this describes a perforation tooth which has been pulled and then looks like the end of a pen nib with a slight split or indentation at the tip. (See also short per...
34. Machine CancelMachine Cancel – machine made cancel normally comprising of two parts, the postmark & date tied to a slogan, flag, wavy lines, bars etc – also called a duplex cancel
Rob ...
35. Short PerfShort Perf(s) – this is where one or more of the perforation teeth on a stamp are missing, or shorter than the remaining teeth. This could have occurred when the stamp was separated from the sheet due to poor perforation or due to carelessnes...
36. Rough PerfRough Perf – perforations, that due to wear & tear or poor alignment of the perforating pins, the paper which the perforator should cut out remains partly joined to the stamp,...
38. PerforationPerforation
– A way of making the separation of stamps easier by taking away small
pieces of paper from the gutters between the stamps. The size
and amount of holes could vary on opposin...
39. FlawFlaw – An imperfection in the design of a printed stamp caused by damage to or a foreign body affecting the plate stamps are printed from. If it is damaged then all sheets printed from that plat...
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Stamp Collecting 
Perfins – 
Are you looking to sell your stamps or collectables? We offer a free valuation service, throughout the UK. We guarantee to make an offer on any collection we view.