If you can post some photos there's a reasonable chance I can recognise the design. Important diagnostic shots are transom from behind, side view, especially showing the rocker line, , bows from about 45 degrees off the bow, showing as much underside as possible and the cockpit internals. If you can arrange a shot of the hull from underneath (tipped on her side in the dinghy park) then a shot from forward of the bow and from directly underneath would be helpful. It would also be good to know how thick the hull and topsides are. Look at the self bailer area to gauge hull thickness. Sail number is almost certainly going to remain a mystery I'm afraid.