The listing, AMATEUR RADIO CARD AUCTION 3 has ended.
A QSL card or amateur radio card is a written confirmation between two amateur radio stations or a two-way radio communication.
They were sent through the mail like a postcard to acknowledge reception. The card included call sign, frequency, date, etc.
There are 10 cards from Oregon. They are dated from 1949 - 1957.
The original postage still on them.
Cards have small holes from being hung up with tacs.