In late 2010 decided to convert an old Fairy Marine Firefly to the MK4 configuration using the new cockpit ply floor strengthening system recently legalised by the Class. I found an old hull that had been converted to MK2 and given a new transom during its life time but unfortunately bore no identification markings. From soundings on the Class forum it would appear that as she had a solid wood centreboard case she was likely to have been a number lower than 900 and hence probably built in the early 1950s. I contacted the RYA who issued me with a new sail number 4077! No royalty to pay as the boat had clearly been built before 1976.