Sunday B. Morning prints are authorized reproductions which are noted in the Catalogue Raisonne of Andy Warhol. This site is not affiliated with Andy Warhol, his estate or any other official Andy Warhol group. Sunday B. Mornings were intended as a joke...with a stamp on the back which said fill in your name here. They are considered to be authentic reproductions and were authorized and included in the Catalogue raisonne of Andy Warhol. They look very similar to the hand signed prints...which are hand signed on the verso...so to the untrained eye..it is very difficult to tell the hand signed and numbered edition from the Sunday B. Morning edition.