24 July 1939. Front of cover where underpayment has resulted in a due of 85f.
Paid for by what at first glance appears to be 4 x 20f, 1 x 4f and 1 x 2f totalling 86f
But closer examination shows that the Postmaster at Hajdudorog has overprinted one of the 20f with a 10. Only example known of this provisional overprint.