The description is correct; Dobbelaer is a well-known manufacturer from the Napoleonic era.
The brass bow or clasp for the bandolier is typical of Prussia. The French didn't have anything like it.
That means this cuirass was captured by the Prussians and continued to be used until a new model...
Three volumes by Nedlitz and Neukirch have been published. Only one of three planned volumes by Heydebrand und der Lasa on the regiment in the World War has been published.
I have these.
I haven't seen any Model 1910 shoulder boards from this regiment. I have a pair of M15s myself.
And i collect this regiment for twenty years.
A field-grey tunic like this was in Jan Kube's Brand collection auction, but with fake shoulder boards.
A very interesting topic that is currently occupying my mind. A few days ago I got these Epaulettes. Generaloberst mit dem Rang als Generalfeldmarschall, Gardekürassier-Regiment. Two possible owners, Kaiser Wilhelm I. or Prinz August von Württemberg.
Last year I also got a shoulderboard...