The prototype "Waveney" [44ft / steel hull] was based on an American design of lifeboat]. So she was known, very unofficially, as "The Yank". She had a tour around the UK, with a staff cox'n in charge. For the visit to Bude in 1966 (?), that was Ian C. Ives, seen here standing second from right.
She never saw "official service" so was not allocated an O.N. [Official Number] although I believe she did more than one tow to safe harbour during her time on the demonstration tours.
Now on show with other preserved / historic lifeboats in the RNLI display at the Royal Naval Dockyard Museum at Chatham, England. [Chatham Historic Dockyard]

NOT MY IMAGE : scanned from B&W print, posted with permission.