WWII playing card deck with hidden escape map - photos

WWII playing card deck with hidden escape map for allied prisoners of war.

Fullsize image: https://s3-us-west-1.amazonaws.com/h...1_fullsize.jpg
https://s3-us-west-1.amazonaws.com/h..._card_map1.jpg

https://s3-us-west-1.amazonaws.com/h...p_fullsize.jpg


More:

https://bicyclecards.com/article/a-m...ide-the-cards/


Previously:


https://www.homemadetools.net/forum/...079#post153480
https://www.homemadetools.net/forum/...762#post140076
https://www.homemadetools.net/forum/...800#post152310

I love spy gadgets. This is one of the better examples of hiding things of use to the man in the field in an object that looks totally innocent. What soldier would stop and closely examine a pack of commercial playing cards?

The only thing regrettable is that once a good idea succeeds, if its ever widely lauded for being a good idea it ceases being one since everyone now knows about it.