In polish OOB as SP-AT vehicle is used De Dion-Bouton mod. 1913 Polish army used them since early 1920. In 1936 was found that equipment was in pour condition especially cars so were rebuild with use of PF621L car chassis. First such vehicles were available since August 1936. But not all vehicles were rebuild so in 1939 were used both versions
PF621L wz.18/24 and also unmodernised
De Dion wz.18/24. My proposition is to add proper photos and add this gun after modernisation with PF621 chassis which has better mobility pressure tyres instead of rubber massive. Gun was left the same and has no better characteristic in AT fire than on De Dion vehicle.
Aviaarmor summary of vehicle in polish and french army
https://translate.google.pl/translat...-text=&act=url
Polish De Dion vehicles
https://audiovis.nac.gov.pl/obraz/115877:1/
https://translate.google.pl/translat...ton-wz-1824%2F
Polish modernised variant on PF621 chassis
https://translate.google.pl/translat...ezne-pf621l%2F
Is possible to add this vehicles to French OOB also because they used them in 1940. French vehicles were the same as Polish De Dion-Buton M1913 and fought in WWI. Were modernised in 1934 to improve AT characteristic new optics and stability stands of the guns but not chassis so were still antic 1913 de Dion. Proposition is to add in french OOB also such vehicles and after 1934 modernised variant with slightly better AT parameters but still poor mobility. Is likely that instead like Polish French rebuild all of their vehicles in 1934 because whole production was only 120 vehicles at all.
Photo of modernised 1934 French variant
https://commons.wikimedia.org/wiki/F...ire_-_1919.jpg
Photo of this vehicle destroyed in 1940
http://forum.axishistory.com/viewtop...58847&start=30