Information on period pilot maps

[philip.ed]

Originally Posted by RedToo

Hi Badaim,

The backing is a mesh of fine threads at right angles to each other. Each thread is like a thread of fine white cotton. The width of the gap between each thread varies between 1 and 1 1/2 millimetres (approximately).

RedToo.

IIRC the backing is linen, but I am not too sure on this, as I have never seen a pre-war example before.
This is a lovely example that you own. Thanks for sharing