A very important Mummy mask stolen from Saqqara, museum storage room, and sold by Ali Aboutaam (already convicted in absentia in the Egyptian Courts to 15 years of prison for art theft, in Al Sweissy trial) to the St. Louis Art Museum in 1998.

Follow this link http://www.michelvanrijn.nl/artnews/soufle3-1.htm to flip over a the literature book:
The Buried Pyramid
Excavations Sakkara
Horus Sekhem-Khet
Volume one
M.Zacharia Goneim
Cairo 1957

Scroll down from top to bottom on Michel van Rijn page: http://www.michelvanrijn.nl/artnews/st-louis.htm

The million-dollar cartonnage mask was stolen in the 90s from the storage of the Egyptian Museum in Saqqara to order by (also convicted in absentia to 15 years of prison in Sweissy trial) Ali Farag for Ali Aboutaam. It was smuggled out of Egypt and sold by convicted Ali Aboutaam, Phoenix Ancient Art Gallery - Geneva & New York - to the Saint Louis Art Museum.

The mask, owned by the Saint Louis Art Museum in Missouri, is from the mummy of an Egyptian noblewoman and is constructed of gauze, bitumen, gold, glass, wood and paint. It depicts the image of a woman’s face and upper body. Her
arms appear to be folded, and she holds two amulets.

[Hat tip: Michel van Rijn]