I was told that in the last days of the war in Germany there were two options for the western allies to secure German technical and scientific knowledge; that is equipment or personnel.

The Russians went for the equipment at Zeiss Jena, The Allies apparently dropped in a team to secure design/ technical staff. One of these was a Herr Nickel (a senior scientist).

By about 1953 he was able to set up a private businees manufacturing optical instruments and progressed to scope sights. I believe that H&H marketed these as an option until abt 1965 and perhaps later but the models abt 1980 passed to using alloy for the tubes. As of 2009 they were still in business but may have been absorbed by a larger organisation.

I'm sure our mate Kuduae has the definitive tale on thir history.