 |
 |
 |
|
 |
|
 |
| Start / | Knowledge / | Safety Measures / |
| Accidentals | Changes | Designs | Differences | Errors | Fakes | Kinds | Mistakes | Parallel Issues | Printers Waste | Quality |
 |
Knowledge / Safety Measures / Watermarks / Fakes |
Fake Watermark: original postage stamp with deceitful bogus watermark or original postage stamp with faked watermark |
|
  |
  |
Genuine Watermark: postage stamp with authentic watermark with no additional forgery |
Watermark Forgery: original postage stamp with deceitful bogus fake watermark |
 |
|
Inverted Fake Watermark: original postage stamp with deceitful bogus inverted fake watermark |
Removed Watermark: postage stamp with original watermark deceitful bogus eliminated |
 |
|
Supplemented Watermark: original postage stamp with watermark with deceitful supplemented parts |
|
 |
 |