Between the two World Wars, Renault (responsible for the first mass-produced light tank) remained an important car & truck manufacturer.
Their designs weren't revolutionary but I can't call them "ultra-conservative. " Some luxury models boasted eye-striking bodywork, like the one we see below, the engines were constantly improved, and extensive use of aluminium in the upper-class segment is noteworthy. Let's take a look.
1932 Renault Nervastella. Coachwork inspired by Salvador Dali. By Austin7nut, on Flickr
1933 Renault Monaquatre by gueguette80, on Flickr
1934 Renault Primaquatre Ad (Spain) via aldenjewell, on Flickr
1934 Renault Monaquatre Ad (Spain) via aldenjewell, on Flickr
1934 Renault Monaquatre 8CV by Zappadong, on Flickr
1935 Renault Nervasport Berline via aldenjewell, on Flickr
1935 Renault Viva Grand Sport by Antsphoto, on Flickr
1936 Renault Celtaquatre by Davidutchy @ Flickr
1937 Renault Nerva Grand Sport by gueguette80, on Flickr
1938/39 Renault Primaquatre Cabriolet by Zappadong, on Flickr
1938 Renault Viva Grand Sport (UK ad) via IFHP97, on Flickr
1939 Renault Juvaquatre by Davidutchy @ Flickr
Headline photo: 1939 Renault Primaquatre RDS Sport by gueguette80, on Flickr