Les Salces(France)
Part of commune of Saint-Privat, to which this is geolocated.
Mainz-Laubenheim(Germany)
Editor of DKAR 1:127 suggests location is Nubenheim, settlement near Mainz. German Wikipedia and Mainz-Laubenheim website (http://www.mz-laubenheim.de/node/2) identify Nubenheim as former name of Mainz-Laubenheim.