UPDATE IV: Well how about this …. There was an early Huffman hub that didn’t have the fancy ‘weapon-looking’ topper (as seen in the pics below). Instead, a cylindrical key was supplied to help select whether the hub was engaged or not. This ad is from the September 1962 issue of Four Wheeler Magazine.
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UPDATE III (May 17, 2020): In September of 1964 the Huffman Hub company posted this full-page ad in Four Wheeler Magazine —
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(UPDATE II: Finally got a look at the 1967 article about Floyd Huffman that appeared in the August 20, 1967, issue of the Albuquerque Journal (pg 28):