The postal service in Hungary also suffered a period of scarcity after the second world war, and cash payment of postage became more common due to the shortage of paper/stamps. In such cases, the postmark with the postal control number (in our case 𝟔𝟐𝟗𝟕) always had to be printed on the mail to make fraud more difficult.
This control postmark clearly identified not only the postal office but also the identity of the postman or postwoman.
