In their second, 1966, recording of the Beethoven cycle, it is stated that Székely plays the 'Michelangelo' Stradivarius (1718), Kuttner plays the 'Santa Theresa' Petrus Guarnerius (1704), Koromzay plays a 1766 instrument by M. Decanet, and Magyar has a cello by Alessandro Gagliano of 1706.