 |
 |
 |
|
 |
|
 |
| Start / | Knowledge / | Issue Kinds / |
| Accidentals | Differences | Errors | Fakes | Kinds | Mistakes | Parallel Issues | Printers Waste | Shapes | Sizes | Quality |
 |
Knowledge / Issue Kinds / Sheets / Parallel Issues |
Sheet parallel issue: the same sheets issued at the same time (e.g. sheet size) |
||
Sheet size parallel issue: the same sheets issued at the same time in different sizes |
Sheet size parallel issue: different sheets issued at the same time in the same size |
|
 |
 |
 |
Sheet with 4 postage stamps |
Sheet with 6 postage stamps |
Sheets with 40 postage stamps each |
 |
 |