The Hohner’s “Meisterklasse” chromatic was introduced around 1982. It was the first high-end harmonica with 14 holes and an anodized aluminum comb. An additional feature were its full-length cover plates, which extend all the way to the ends of the harmonica’s comb rather than sharply angling down before the ends to form an adjoining surface parallel to the reed-plates and comb.
From it’s introduction to circa 1990, Hohner received customer complaints about powdery residue originating from unplated brass reed plates contacting the aluminum comb. The production was stopped. A re-issued version came out about 3 year later (date not confirmed). Additional versions with slight improvements were released thereafter.
I found this interesting website showing a custom Titanium comb for the Hohner Meisterklasse:
An interesting feature is the additional slide button at the lower part, similar to the CBH 2012/2016.