to determine exactly what are the self propelled bullets you have to show the base
This is the typical base on No. 2 & 4.
This is the base for No. 1 & 3.
You don’t have any Gaupillat ctge here.
from Left to right :
Nota : Colette is the name of the gun.
The ctges were made by Fusnot
Here are some ctges of my collection. You will see a Gaupillat ctge.
Thanks for clarifying and posting pictures of the different types. It is much appreciated!