Help Identifying these 2 large guns and one Flak

[camo master]

Can anyone help me identify these guns that are from WWII.

1. 2 photos of possibly a French or Belgium gun used by the Germans

2. I believe this is a French gun but dont know the designation

3. At first I thought this was a 5cm Flak 41 on a Enheitz Diesel but on closer inspection, I dont think so. Its larger than their 3.7Flak


1.

[camo master]

2.

[camo master]

3.

[jotuntroll]

Hi

Guess:
pic1: 10,5 cm k331(f), pic2: morser 18 and pic3: 3,7cmFLAK.