I stumbled across an image of Apophis which hasn’t been cut, chained, or otherwise negated. It’s in the Ramesside tomb of Sennedjem, in a scene illustrating Spell 108 of the Book of the Dead, in which Set repels the serpent. I was surprised to discover that, counter to many peoples’ claims and my own understanding, Apophis was sometimes represented without magical precautions. (To spare the sensibilities of Kemetics, I’ve linked to the page containing the image rather than posting it here. The scene is visible in an earlier posting of mine.) ETA: Getty Images gives a good view of the whole scene.
ETA ETA: Both Apophis and his name are shown without negation in the Third Hour of the Book of Gates (from Seti I’s sarcophagus, as shown in Budge’s The Egyptian Heaven and Hell). Perhaps it seemed safe because of the context: gods are lining up to destroy him. (There’s a large, colourful illustration of this in the tomb of Ramesses I.) ETA ETA ETA: Same in the Ninth Hour; again, perhaps the context (spells against him) is sufficiently protective. In the Tenth Hour Apophis is shown chained, but his name is written without negation. In the Eleventh Hour the name is written with a determinative for the first time, and that has been negated with a knife to the head.
ETA: Here’s another one, in the Papyrus Bremner-Rhind.