Here is a 9mm Single Action / Double Action German Police revolver that I have been after for awhile. These are described in the new Horst Friedrich book, "Dienstwaffen der deutschen Polizei und Gendarmerie, Historie, Technik, Kennzeichnung" in Chapter 9. My recently acquired example is similar to the Bavarian Gendarmerie and Berlin Type examples shown in his book.
This six shot "Polizei Revolver" has a case hardened frame with the octagon shaped barrel, fluted cylinder, trigger group assembly and hammer nicely fire blued. The black ebony grips are finely checkered and the butt plate has a lanyard ring as is normal for these revolvers. There is a safety lever on the left side of the frame and the top strap is engraved with "Polizei Revolver". This revolver has Belgian proof marks and was made by Jean-Baptiste Ronge in Liege for the German market around 1894. Ronge also made special order police pistols for the "English Constabulary" and the French Gendarmerie" with the appropriate markings. The unmarked generic German made revolver holster can fit a S&W M&P with a 4" barrel or this pistol.