I have finally managed to finish my 15mm (1:100) Weimar Republic Schupo Sonderwagen of 1921. At least one of these armoured cars was still trundling around Berlin when the Soviets took the city in 1945.
The STLs are available at https://www.wargaming3d.com/product/daimler-schupo-sonderwagen-1921/ (https://www.wargaming3d.com/product/daimler-schupo-sonderwagen-1921/)
It should rescale fine to 1/72 or even 1/56.
(https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhCD7Ee8sYNnA4F5NW0E3YFossOp8mNTn-Pqli9IaiW4wDNw4l2EY1i97910ZWqkblnnBvtmEKygqN9IhZ1uk1TbWt9WfKCwpodv4CZvc84t8Y2JDtOBMs5P74AYCVNJ0JPTToFHNFYq5yhckWF3r1upId3WRG7LEz7k9eoNe4H40FSDpSrGefp3Yd7svB8/s800/DaimlerSSW1921_01.jpg)
(https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEijmbFpGSMa3fljuKaSY2oqz6iuZ8SsfQkQDjG5jgH6lfzX_DEsqPUYXvqagIXXQCDWr-dTAXmbHxWf9muDMtI_AuYgGsj5Ve-m8RzrKnDEKwfhtPdpO1-3Mh6l2uHcVu6Kl89TgCFrORFeZH7f0j94F44IWS9HE3i__6IAlijf6OHs2oAOyHs5uKNbrDAK/s800/DaimlerSSW1921_02.jpg)