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This one is the SdKfz 234/3 "Stummel", an eight-wheeled armoured car mounting a short-barrelled 75mm gun. It's handy having a vehicle that counts towards a force's scouting value, while also mounting a fairly hefty gun for blowing-things-up purposes. The model is 1:100 scale, for 15mm gaming.
The model is designed by Zachary Kavulich, printed by me at 0.1mm layer height in eSun PLA+ on my Ender 3.
The crewman is one of the passenger figures from PSC's SdKfz 251C pack, and he's not ideal; I have a real shortage of figures suitable for crewmen for this sort of vehicle. That's one of the reasons why I'd like to get myself a resin printer, so that I could design and print figures for this sort of purpose.
Next off the printer, the SdKfz 234/4 with the PaK 40 75mm.
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This one is the SdKfz 234/4. Rather than the low-velocity howitzer of the 234/3, this one mounted a 75mm PaK 40, an excellent German anti-tank gun capable of handling almost any Allied tank right up until the end of the war.
This model was designed by M. Bergman, and the crew figures are a couple of 15mm German artillerymen from Peter Pig.