A rare signature from the great Belgian violinist, signed on an A4 mount below an inset halftone photograph clipped from a program. Grumiaux has signed boldly in black and dated April 23, 1971. In very fine condition, 8.25 x 11.75 inches (21 x 29.7 cm). Together with several German newspaper clippings on Grumiaux's death. Signatures from Grumiaux are rather elusive.