During WWI German produced some quantity of 7.9x57mm ammunition with copper washed steel cases.
Among the very rare German WWI 9mm P08 rounds are the copper washed rounds which were produced in 1917 and at least one type made it as far as field trials. Known specimens were made by Spandau (three known), Cassel (about 7 known) and Geco (one known-Ge D headstamp). An additional Spandau round was documented in a German collection about 40+ years ago, and probably the same round was later reportedly in a US collection. The US collection was sold to the Woodin Lab, but the steel case Spandau round was not in the collection when sold. With the exception of two or three of the Cassel rounds that are in Germany, the remaining rounds are in the Woodin Laboratory or in my collection. The Geco round is in the Woodin Laboratory.
Recently a copper-washed steel case 7.65mm Browning round showed up in Germany, headstamped RM S. Clearly another piece of the German WWI copper-washed steel case pistol ammo story.
I am trying to run down the rest of the story and would appreciate any help from Forum members.
If you know of ANY German steel case pistol cartridges from WWI vintage, even ones that may duplicate the known specimens, please let me know. It is also very possible that steel case rounds were made in other pistol calibers other than 9mm Luger and 7.65mm Browning. I would not be surprised if steel case rounds turned up in 9mmK, 9mmBL or 6.35mmB. It is also probable that other manufacturers were past of this effort.
As far as I know there is NO documentation on these rounds.The dated rounds (9mmP08) are all dated from mid-1917 to the end of 1917. There must have been documentation on this effort, perhaps even a passing reference in the documents pertaining to the 7.9x57 steel case development and employment. Any documentation or suspected sources of documentation would be appreciated.
Clearly this effort, at least the 9mm P08 part, grew out of the 7.9x57mm development. It would be useful to know which companies are known to have made steel case ammunition in 7.9x57, and the dates of these rounds.
Any help or advise would be greatly appreciated.