German WW II "SOLDBUCH" Holder

Private Purchase "Holder" is made of thin cardboard with green finish, with embossed silver eagle and swastika on front with silver "Soldbuch". Inside is lined with light grey paper finish and marked with maker. The holder is about 4-1/4 wide and about 6 inches high when open about 8-1/2 inches wide. Has slit on inside cover to slip the front cover of the Soldbuch into. Overall shows some light age and wear. Do not know what branch of service it could be for. Exc. + $75.00