[CR] Humber frame with 4 barrelled fork

Here's one I haven't seen before, a Humber frame with a different fork design.  Nothing for Humber on the CR GB pages.  Archives are down, so I apologize if these were discussed before.  How long were these on the market?  Did they work, or give any advantage?

http://ebay.com/<blah>

or ebay item: 160420791805

Tom Adams
Manhattan, KS, USA