I'm not sure what the case was intended to carry, but the marking does not appear to be an RZM logo. "Alkor" refers to a simulated leather made of coated cloth. Hope these comments are helpful and I hope that someone can tell us what the case was for!
I'm not sure of the size as there is no reference in the photos, but I would presume it is for a musician's fife. Br. James nailed the "Alkor" material. Actually, it is a trademarked name for the manufacturer's artificial leather material produced under heat/pressure. I would be very careful with the material if hard as it breaks easily.
Comment