Although Ruby pistols were considered as "emergency pistols" in french army in WWI, they were so numerous (near 1000000 buyed in spain!) that it was the more numerous handgun of french army at the beginning of WWII. At the end of the desastrous compaign of may-june 1940, german soldiers captured thousands of Ruby pistols. They considered it as what it was, a rather poor to middle quality gun but their handgun shortage forced them to supply second line troops with it. In the german nomenclature, it was the "Pistole 624(f)" Calibre 7,65mm. Neither a hangun was useless in WWII german army, so a .32 ACP pistol, even a poor quality one, was welcome!
I remember an old resistant telling that he captured in august 1944 near Limoges in France, a SS soldier wearing a Sten machinegun and a french Modèle 1892 revolver Cal. 8 mm Lebel... What a strange armoury combination!