Last wednesday I went to the meeting of the local ham club, www.pi4raz.nl, and was surprised to find about 25 QSL cards of some past QSO's.
Some of them are very interesting. I scanned four of them:
First contact on 4 m (70.2 MHz, SSB) with Estonia; Hellar in Tallinn
First 10 m contact (28.120 MHz, PSK31) with Liechtenstein, Waldemar
First (confirmed) 10m contact with Israel, RTTY contact during Holyland Contest
7 MHz, LSB QSO with Lionel from the Channel Island Guernsey