The Stele of Revealing

The back of the Stele of Revealing

Next to the number "666" is a blurred out number, but if you look at it a certain way it almost looks like the number "187" backwards, Egyptian is read from right to left.

Excerpt from an article on Wikipedia about the Stele of Revealing:

"The Stele of Ankh-ef-en-Khonsu i (also known as the Stele of Revealing) is a painted, wooden offering stele, discovered in 1858 at the mortuary temple of Hatshepsut at Dayr al-Bahri by François Auguste Ferdinand Mariette.[1] It was originally made for the Montu-priest Ankh-ef-en-Khonsu i,[2] and was discovered near his coffin ensemble of two sarcophagi and two anthropomorphic inner coffins. It dates to circa 680/70 BCE, the period of the late Dynasty 25/early Dynasty 26. Originally located in the former Bulaq Museum under inventory number 666, the stele was moved around 1902 to the newly opened Egyptian Museum of Cairo (inventory number A 9422; Temporary Register Number 25/12/24/11), where it remains today.
The stele is made of wood and covered with a plaster gesso, which has been painted. It measures 51.5 centimeters high and 31 centimeters wide. On the front Ankh-ef-en-Khonsu i as a priest of Montu can be seen; he is presenting offerings to the falcon-headed god Re-Harakhty ("Re-Horus of the Two Horizons"), a synchronistic form of the gods Ra and Horus, who is seated on a throne. The symbol of the west, the place of the Dead, is seen behind Re-Harakhty. Above the figures is a depiction of Nut, the sky goddess who stretches from horizon to horizon. Directly beneath her is the Winged Solar Disk, Horus of Behdet.
The stele is also known as the "Stele of Revealing" and is a central element of the religious philosophy Thelema founded by Aleister Crowley." - wikipedia.org

"Interpretation by Aleister Crowley and Thelema

The designation of this object as the Stele of Revealing was given in April 1904 by the occultist Aleister Crowley, in connection with his Book of the Law.[9]
According to Aleister Crowley, his wife Rose had already reported a revelation from the god Horus, through his messenger Aiwass[10]. The couple went to the Bulaq Museum (no longer in existence), near Cairo, to see if she could recognize Horus on Monday, March 21, 1904. Rose recognized an image of the god on this painted stele, which at the time bore the catalogue number 666, a number holding religious significance in Thelema.
According to Crowley, the stela depicts the three chief deities of Thelema: Nuit (Egyptian Nut), Hadit (Egyptian Behdety), and Ra-Hoor-Khuit (Egyptian Re-Harakhty ["Re-Horus of the Two Horizons"]).
Crowley states that he dined with the Egyptologist Émile Charles Albert Brugsch bey, Curator of the Bulaq Museum to discuss the stele in his charge and to arrange for a facsimile to be made. According to Crowley, Brugsch's French assistant curator translated the hieroglyphic text on the stele.[11] In 1912 a second translation was later made for Crowley by Alan Gardiner and Battiscombe Gunn." - wikipedia.org