Machin stamps produced in different formats over a half century – Linn’s Stamp News
|
Machin stamps produced in different formats over a half century
Linn’s Stamp News An iridescent overprint was added to Machin stamps starting in 2009 to deter counterfeiting. Visible on this stamp are the year code “15” at the top, just to the left of the phosphor band, and the source code “T” at the upper right. The “T” indicates … |
More: continued here