OK ----We need to clear the air about this stamp -----I am no expert ,never was and never will be ......I am a worldwide collector !!
First I read all the links here about this stamp and a lot of so call experts are giving their input .
So let me put up what I have ,since they don't seem to have the material . The first stamp and the fourth stamp are FAKES ,the second stamp and third stamps are real .
Notice the difference in the perforations not measure but the cut and how the holes are different .