Hello Tony,
Thank you very much for your answer Tony...and your time.
Sorry, but it's not aerial photos, it's a photos taken from the Division or man.
I put a poskarte for exem.
You see the white N° O.25.
It's the same like you say about RAF. But for sector and village.
Here, easier with the name (Etricourt -Somme) but there are another postkarte from this collection...O26 !!! ; O.27..!!!, O.25 Etricourt, O.24 !!
This list are the name where the postkarte are taken.
Encore merci pour l'aide, thanks for your help;
Philippe