Original German WWI Mercedes D.III Daimler-Motoren-Gesellschaft Aircraft 6-Zylinder Engine Data Plate Japanese Militaria so they easily deform with

so they easily deform with use and especially moisture

At this point the Magazine Lee-Metford Mk

There are no markings present on the hanger ring

so it definitely looks to have been cleaned after the last time it was used

the Maynard tape primer is marked on the cover with the patent information:

Original German WWI Mercedes D.III Daimler-Motoren-Gesellschaft Aircraft 6-Zylinder Engine Data Plate Japanese Militaria so they easily deform withOriginal Item. Only One Available. This is a very scarce piece of German aviation history. This is a data plate off of a German Mercedes D. III, or F1466 Six Cylinder engine, famously used in a myriad of different German aircraft during World War I, to include many by Albatros, Fokker, Junkers, Pfalz, and Hansa. The data plate measures 4 x 5 15 16. The plate reads: Mercedes Flugmotor No. 28089 Zyl. Zahl. 6 Motor: richtig eingestellt wenn. N. 1450. P.