Soiree by Erte

I was given this print as payment in the 90s from a framing employer. It is in an incredable custom plexiglass box frame with double velvet mats and fillets. I worked at the frame shop, so i am shure it is archivaly framed. The print itself is pristeene and NOT the mass produced poster with the "ERTE" printed on the bottom. The only reason I would not concider it mint is a small scuff mark in the left upper corner on the plexi frame.. NOT the print. You can see a signiture in white on the lower right.I have not opened the paper across the back to look for any authentications or numbers on the back. I believe it is a lithograph or serigraph, with silver background and gold on her belt.