free french libre trucks identification need

[AKosion]

Attilio,

This is one of 12 so-called "Conus Guns". They were French 75mm M1897 field guns, mounted on Fords and Chevrolets, on turret races from captured M13/40 Italian tanks. The idea was proposed by a Lt. Conus, hence the name.
The 12 guns made up the 3rd Squadron of the Regiment de Marche de Spahis Maroccains (remember them from your "Revanche" query?). The other 2 squadrons had Marmon-Herrington armoured cars.
A rather good book on unusual Free French troops and vehicles is "L'Odyssee de la Colonne Leclerc", from Histoire&Collections, a mostly pictorial history of Leclerc's colonial force that crossed pretty much half of Africa to end up in Tunisia in '43, giving Free France its first battle honours in the proccess.

Best Regards
Aris Kosionidis