Folks, Dallmeyer's Super Six was first designed around 1930. It is a slightly asymmetrical 6/4 double Gauss type and is similar to Taylor Hobson's Ser. 0 OPIC. Super Sixes have become cult items and sell for absurd (in my opinion) prices. I sold my 6"/1.9 via eBay ages ago. My wife's eyes got very big when she saw the selling price, and since the examples of that lens have brought five figures.
With respect to the auction listing posted above, it ain't over. Wait for the last minute snipe bids to come in.