I'm trying to find the history or previous owners of Merlin 714

Merlin 714 "Mambo"is listed in the 1960 Year Book as being a Jack Holt boat but in the 1961 book she is listed as a Chippendale built Procter Mk.9c with the hull being completed by the original owner.  If a Holt boat she will have a plastic plaque stating "Designed and Built by Jack Holt, The Embankment, Putney".  At this time she was at Tamesis Club, Teddington and listed as still there in 1986.  After that there is no record.