A medical saw concealed in the lace of a shoe sent to prisoners A compass hidden inside a walnut Reichsmarks concealed inside a gramophone record An MI9 escape suit A pencil cum compass

A map of Danzig concealed inside a cotton wheel

MI9 Devices

 

Wire cutters and a compass hidden inside a book A fake German rifle, made by prisoners An air pump used to ventilate a tunnel One of the air pumps used to ventilate the tunnels Escape maps hidden inside playing cards

A button compass and escape map

General