When my mother was in Europe back in the eighties, she exchanged air-mail letters with ny father back home, maybe five or six in the four weeks she was there. Two, three day service, basically.
My landlord Sergey in Ljubljana gave me a post card to send home. I have it to him on the 4th of October. OK, he only mailed it later, because the cancellation is dated the 14th of October.
It arrived here today.