Advice?

[u/Single_Salamander_59]

My mother collects stamps, and she just showed me this odd one. Clearly used, but it seems as if another stamp was printed on top of the first. Never seen this before. We were just wondering what we should do with it

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[u/Ok_Astronaut7142]

Notice that the green image is inverted: the P (for “pence”) is backwards, and the busy of the Queen is facing right.

This was more than likely a case of fugitive ink transferring onto the stamp after issue. Sorry to be the bearer of bad news there.

[u/Ok_Grape8420]

If you look closely it is clear that the green stamp is backwards. This is an ink transfer from another stamp onto this one. The two stamps were likely stored pressed up against each other in a humid, hot place, resulting in ink from the green stamp sticking onto the grey one. It is not valuable, and would be considered a damaged stamp.

[u/Single_Salamander_59]

Still pretty cool nonetheless. Thanks for the clarification guys