Robert Ruck lived from 1945 to 2018 and was a prolific maker of classical guitars. Ruck started making guitars in the mid 1960s in Miami and is best known for his guitar number 58 sold to Manuel Barrueco in 1972 which became the virtuoso's main instrument. Ruck made more than 1000 guitars and his instruments were played by Berta Rojas, Carlos Barbosa-Lima, Celedonio, Celin, and Pepe Romero, Gerardo Nuñez, Leo Brouwer, Michael Lorimer, Kaare Norge, Paulo Bellinati, Michael and Joanne Andriaccio, Sharon Isbin, Tilman Hoppstock, and many others.
Source: Noted Luthier Robert Ruck (Builder of Manuel Barrueco’s Famous ‘No. 58’) Passes Away at 72. Classical Guitar Magazine, August 15, 2018