Today was a slow day, I’m the middle of an NDB “contest” that doesn’t bring much sofar…(more about that tomorrow). So time to dig into my QSL collection for something special! I believe this is my tiniest QSL. Oh irony, it is from one of the biggest countries in the world: China! Funny fact: it came in a regular sized envelope!
In those days maritime stations were broadcasting CW markers which made long distance reception relatively easy despite limited transmitter power.

The smallest QSL card in my collection: Shanghai Radio XSG