Sante Pogliaghi was the builder/owner of the original name. He grew too big to build his own bikes and farmed them out to a variety of subcontracting manufacturers in the early 80's. The bikes' manufacturers are recognized by the approximate vintage based on the serial number in this case, although there are people here who can tell a Basso from a Rossin, just by the construction. (I'm not one, unfortunately). You can get the condensed story and some nice pictures here.