I have been this route before and still have not received a knowing answer.
Problem stamps: 100th Anniversary of South Australia, issued February 12,
1986. I have looked at these ***s until me eyes are crossed. Incandescent
light, Neon light, Flourescent light, Sunlight and even Flashlight and still
get the same results.
I have a single used copy where tghe background printing is bright emerald
green, no other copies found like this. The other copies I have the background
print is either black, gray green or gray. Do you have a clue why the
Ralphael the OLD one (Yep, I'm back)