I have this set, all original still in original packaging. I do not want to break the spine of the collection, but I do have one photo (print) of the other vehicle. One show it in traveling position and as you can see the other shows it ready for action.
all 4 pictures display German anti-aircraft guns. Number 1 and 3 of your collection are the same and Rob described them in another of your threads. Number 2 is the German 7.1-cm-Kraftwagengeschütz L/30 Krupp 1910. (Max speed 60 kph, ammunition "Brandschrapnell" of 4 kg weight)
I could not find my reference for number 4 but it is a Krupp gun for AA use as well and was put on the car for transport to get the same mobility like the mobile B.A.K. models (B.A.K. in 1916 renamed Flak) of Krupp´s only competitor Eberhardt. To my knowledge the French series included a second picture of this gun just leaving the car. As well the French printed some other German pre-war models of B.A.K./Flak on their postcards.
Acc to Herbert Jäger, Pic 4 is a "10.5cm LFH16 on a 4-ton truck."
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Acc to Herbert Jäger, Pic 4 is a "10.5cm LFH16 on a 4-ton truck."
When I was reading Jäger´s book I immediatley disagreed with his description. Note, the picture was already published in German pre-war sources and printed in 1914/15 on French post-cards. That excludes a LFH16. Furterhmore, the shape of the gun is definitiv not a 10.5 cm LFH 16. I will try to find my Flak source reference to clarify that but it can last some time.
In my humble opinion the gun in question in picture no. 4 is "6,5cm Geschütz L/35 in Räderlafette mit abschwenkbaren Rädern, Krupp 1908".
This anti-aircraft gun was tested in exercises, shootings and manoeuvres from 1909 to 1911. The picture is obviously displaying a test, an improvisation with transport by car. Originally the gun was developed as horse-driven B.A.K. but competitor Herr Ehrhardt of Rheinische Metallwaaren- und Maschinenfabrik [post-war called Rheinmetall] had fielded mobile B.A.K. on cars from the very beginning (1905). So, Krupp was obviously trying to compensate the disadantage by setting the B.A.K. on an automobile. However, the gun could not fire from the car. The gun had to be moved down from the car and had to leave the street (!) before it was able to start firing.
yesterday evening I found the right source. In Bernard Delsert´s super-book "La Flak 1914-1918" vol. 1, page 44 displays your photograph and the second which I mentioned (sadly, very bad quality) unter the headline "La mobilité stratégique" in the chapter about the afore mentioned and displayed 6.5cm-gun.
