Bidspirit auction | Postage. Switzerland. Letter sent from

Postage. Switzerland. Letter sent from Basel on October 24, 1922, unfranked and postage stipulated at 80 centimes, to Lisbon on October 28. The recipient refused to pay the 80 centimes (stamps on the back of 20 and 60 centimes), so it was returned to the sender, who had to pay a postage fee of 50 centimes on November 4, as he was the holder of a Post Office box. Interesting.