ΕΞΗΛ.... ??

Hi !

Can you help me with this mark ? 
Foun on cover from Thessaloniki to Uk in 1932.

Thanks you, Nicolas !

[Πρέπει να είστε εγγεγραμμένοι και συνδεδεμένοι για να δείτε αυτόν το σύνδεσμο.]

EΞΗΛΕΓΧΘΗ, means "checked", a mark of currency control before Metaxas era.
These are known from 1932.

Ok, thanks you !
My cover is dated 21 October 1932.