My questions pertains to Sc#2531Ab. I have two of these panes, one is printed on white paper as described in pertinent resources. I have a second one printed on YELLOW paper. I have not been able to find any information in the yellow one.
I have included a picture of the white and one of the yellow one. The yellow doesn't show up correctly. The real pane is quite a bit brighter yellow. I have also included the back of both panes. The back of the white one is as described in the Scott catalogue. The yellow pane has a different back. It is in black writing except for the words "Self-adhesive Stamps, and the torch which are in green. Any help on this is very much appreciated.