Our collection of hand signed warhol screen prints includes pop art subjects of flowers marilyn monroe mao cow and campbell s soup and are of higher collectible value due to their distinct color variations and one of a kind nature. Our collection of hand signed warhol screen prints includes pop art subjects of flowers marilyn monroe mao cow and campbell s soup and are of higher collectible value due to their distinct color variations and one of a kind nature. Andy warhol 118 gifs.