Quattro Assi (4-aces) was the "house brand" frame name for William Lewis imports. He sourced frames from a variety of manufactures and sold them under the Quattro Assi brand (as well as importing Tomassini and several other nice name brand frames). I still have a Quattro Assi columbus EL-OS frame (awaiting long overdue restoration) that I got from them in a racing sponsorship deal about 20 years ago. It was built in columbia by Canopus. Bill always managed to source and sell fairly cutting edge frames at good prices. It looks as if all the William Lewis imports business web presence has evaporated so I wouldnt be suprized if Bill retired and shut down the business, it was always somewhat of a small one or two man operation.