I just received this #42 gray Large Queen won on an auction.
Picture worth a thousand words so here they are.
There are prints on the back of the stamps that look repetitive. We can see the main one on center-right and the second one on the left side.
How many of those "à la queue-leu-leu" ? meaning, one after the other

The print is the same as the one in front of the stamp but it is not at the same level, there is no miror effect.
The question is, how could that happened?
Assumption : Could it be possible that the printer was running almost out of ink while the paper kept being punch/marked with dry ink leaving a print on the paper?

Could it be possible that the operator after refueling the missing ink, decided to re-use the same sheet and continue the printing on the verso of the sheet?
Curious to read your comments


