Need help! EK 1 Schinkel Deumer real or fake

Hi all,
I am doubting the EK1 below.
I have looked in the book The Iron Cross 1. Class by Maerz and Stimson but still i am not sure.
It could be the Early Schinkle type using real leftover silver WWI frames? It has a magnetic core mesurement aproximatley 1.75 inch.
I never seens one with the maker mark and 800 on top of the pin.
Please advice?

Unfortunatley these are the only pics i have…


Click to enlarge the picture



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