Many thanks to SWLing Post reader,  Timm Breyel, who writes:

While browsing your site I noticed the QSL Gallery page. Interesting. I have many old QSLs from the 1960s and 1970s, all of which are stored away in the States, all except one. It’s a 40 year QSL from Radio Malaysia via Penang Island. The station was received in Denver, Colorado in 1975.

It’s not the most attractive of QSLs, but it certainly is quite rare.

Timm, I love this QSL card and I have never seen one like it before. Thanks so much for sharing it with us!