Hello Grandpa, The grp hull is almost certainly a 'Cheverton Crusader' class yacht designed by David Cheverton. If you want to see many photos and a set of lines, go to the Cheverton website. (Google search) I have sailed on one owned by a good friend, a lovely yacht that really sails well. If you decide not to proceed with the model, let me know as I think he should make a model of 'Pentoma' as a winter project! All the bast, Lemmerhengst.