C108 & C109 : perforation trouble

Hi,

I'm in trouble with stamps Hellas C108, C109 and their perforation variation (reprint) C108A, C109A.
Every stamps I have are perf in 14 instead of 13 1/2. Other stamps are perf in 13 1/2 * 14 instead of 12 1/2 * 13 1/2.

Possible mistake in Hellas Catalogue ? (page 322 in 2018 edition).

Thanks !

Dear friend.
I am not the one that can answer but i can give an alternative perspective.
As Mr Virvilis told us in his essay over "Stadion" there can be different perforations.
Unfortunately this essay, published by Hps in 2008, is only in Greek.
[Πρέπει να είστε εγγεγραμμένοι και συνδεδεμένοι για να δείτε αυτή την εικόνα.]
I wish that i could be more helpful.

Hi, Ok thanks, will try to find this !