worldtea:
During WW2 Bicycle Cards designed a deck of cards which revealed precise maps of German areas indicating escape routes when soaked. These were sent to POWs in Germany as a Christmas present. The Germans never found out. (via)
During WW2 Bicycle Cards designed a deck of cards which revealed precise maps of German areas indicating escape routes when soaked. These were sent to POWs in Germany as a Christmas present. The Germans never found out.
(via)
(via gummykazi)
