John Wayne Gacy original 14" x 18" Orioles painting signed on both sides. 

Hand signed on the front, John Wayne Gacy.
Hand signed, titled and numbered on the back, Signature Birds Orioles Set John W Gacy Acrylic 1376.

There are some faint fingerprints which appear on the far right back of the canvas. 

John Wayne Gacy Orioles Painting Signed Twice