A colleague inform me about this RK, it's quite strange as the marking is "HMA L/12". To my knowledge "L/12" usually accompanied by "800" marking. Another issue is that to my eyes, the ring is slightly dipped into the frame of the Cross (dipping ring?), and as long as I know only Sedlatzek had made that kind of variant, otherwise can be concluded as fake. Therefore I personally think this to be a fake. However I want to hear your opinion, fellow gentlemen as I never seen this kind of marking before.
Thank you,
Windu