These came from an old magician’s estate purchase. Three of the gimmicked cards used in the Brother John Hamman’s classic four ace trick. They are in very good, almost new-looking condition. This is not the complete set of gimmicked cards used in the routine which required six.
They are Fox Lake bridge size and have blue backs.
Maybe someone (who already owns the trick) has a use for them as replacements for their lost, damaged, or worn cards.