The gun used in the test trials with the 55-degree grip angle and the two collections guns (Aberman and Norton) with the 60-degree grip angle are all original and all made by DWM in approximately the 1907 to 1910 timeframe. The blueprints made by Mike K. were made from the Aberman gun. So the blueprints are correct for a 60-degree grip angle .45 caliber Luger made by DWM. To my knowledge no blue prints or engineering drawings have been located or reverse engineered for the 55-degree test trials gun.
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If it's made after 1918...it's a reproduction
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