I had this interesting pistol with super markings in terible finish condition. Sent it to Charles Danner for re-finishing, and am very pleased with the result. Charles does super work.
The Dreyes was not "worth" restoring, as the refinish cost about twice what the pistol did; but it sure is pretty to look at.
For those interested, the markings are from the Kongliche Police Presidium of Berlin (canceled) and then to the Kripo Berlin(Kriminal Polizei).
Thanks Charles.
Before and after pictures are below; I don't think you will need a guide to pict out either.