1 is a 30/06
2 is a 13 mm (mg 131)
3 is a .50 browning (m2)
4 must be 151 15 mm
5 must be a shivak. 20mm (look at the buttom, rim)
6 151/20
7 Hispano 20 mm 20x102
8 2cm flak 38? 20x139
9 30 mm 108 mk
10 37 mm APC
11 37 mm HE
12 40 mm bofors
Just a Wild guess, I guess....LOL
Crabofix