Foro de Filatelia Argentina

The Unusual 25c1Et

The vast majority of the 25c1E1 were printed with the watermark perpendicular to the image of the stamp. This constraint is caused by the use of a paper roll in which only one direction (left or right depending on the relative position of the plate to the roll of paper) is possible. The only way to create the 25c1E1t is to print in pre-cut sheets from the roll that have been rotated 90 degrees. Apparently, this is what happened.

Three 5p1E3s

These are examples showing the differences between 1E3a and 1E3b.

Here is a 1E3a. The angle between the threads is rectangular.





...and another 1E3a.





....and here is a 1E3b. The angle between the threads is square.