R1 and I had a discussion about these recently, in that he or I have never seen an M1915 officer's Tschako with removable chinscales. You would need to have M15 officer scales to use the Überzug that James posted. All the officer Tschako Überzug examples I have owned or seen over the years, were like the standard pre-war Pickelhaube cover, no slit for scales. But these Tschako Überzug are interesting, in that they have the M15 slit for a chinstrap, but a slip on visor. So what are they? Are they private purchase Mannschaften? Or are there officer's Tschako with removable chinscales out there somewhere?