1914 Iron cross 1st class screwback variant "800" by AWS/Juncker, Berlin. Three piece construction with magnetic iron core, with soldered on cylinder. Apart from the "800" silver content, an unmarked example. Two piece device with small screw button and pressure disc. Unfortunately, the pressure disc is missing. Light worn condition. No repairs, no damage. 

Interesting real silver 800 piece. Beautiful quality with typical Juncker cross hatching to the frame.