Vintage 1941 glossy 7.1 x 9.1 RKO Radio Pictures black and white chest-up studio portrait, boldly signed and inscribed in black fountain pen, “To/Mae/Good Luck/Charles Coburn.”  Fine condition, with neatly trimmed borders;tiny bends to the four corner tips; a faint vertical bend in the background at the top, intruding about an inch into his forehead; and a small ink smudge to the final letter of his signature.