The number is stamped on many parts all over the boat. You can usually find it on the bulkhead behind the upright part of the seat on the cockpit side, on the cross piece where the engine lid support is bolted to the lid, on the edge of the engine lid frame, on the top edge of the cover for the hole in the front bulkhead (by your feet) and on the bottom part of the bow cleat (not many people find that one!).