I was in France a few weeks ago and managed to get a quick bit of detecting in Normandy on the way home (with land owners permission of course).
Best find was the saddle drum (empty) and also found a cloverleaf cap for mortar shell container plus packing rings and clips, and a couple of knackered artillery shell cases, I believe one German and one US. Sandle drum has come up quite well after some electrolysis, but the cloverleaf cap looks to be all rust and mud and would probably disappear to nothing if treated in any way so is going to stay as it is.
Also found that strange pice of steel, which is 4" x 3.5" and 0.5"" thick, with hole through the middle. It looks like a lid or hatch as it has tapered sides - anyone any clues if it is military or maybe off a French tractor