Hello, to my best knowledge (but I am no uniform guy) the cuff title "Ost" and the RMBO are two different things. I have a lot of photographs with the ""Ost" cufftitle, eg Bahnschutz (rrpp), Staatsbeamte (gov.), Postschutz (postal protection) and Forst (forest) but none of them is member of the RMBO (Reichsministerium f?r die besetzten Ostgebiete) whose mebers had very special and distinct uniforms (and eagles).
Please correct me when I am wrong.
Regards,

wotan, gd.c-b#105

"Never look for sqare eggs" as a late owner of an original FHH-dagger used to say.