Grumiaux, Arthur. (1921–1986) & Witkowski, Jean. (1895–1953) Signed ProgramSigned program of a concert of the Association Philharmonique of Lyon, France, December 5, 1948. The signature of the Belgian violinist and conductor is on the first page (not counting the cover), above the program listing. There is a second signature next to it, probably reading "Witkowski" (Jean Witkowski was the conductor). 8. 5 x 5. 5 inches (21. 0 x 13. 5 cm). Horizontal fold; slightly browned; else in fine condition. "Grumiaux's high reputation