WWI 1st Class With RZM/SS Marked Screw Back?

[horsetrainer]

WWI 1st Class With RZM/SS Marked Screw Back. Were some screw backs RZM/SS Marked or is this fake?

[bodes]

I would say it's been spuriously added because it also looks like there may be a hallmark on the screw back.....Bodes

[horsetrainer]

Is the WWI Iron Cross original with the sprange?

[Douglas 5]

The disk is a known fake . The extra fine threading post is probably part of the Ek back - which would make the whole thing a one piece fake .

Douglas