With German cameras it much depends on when they were made. I have a Zeiss Ikon Tenax made in 1942 and the lens is so milky it is unusable. Same applies to some lenses made in the early 1930s. My three Zeiss Ikon cameras made in the mid 1930s have excellent lenses (one Tessar, two Novars).

EDIT: the Super Ikonta III was made in the late 1950s and should have excellent lenses - unless someone has "repaired" them.