Erte Elegance Limited edition fashion lithograph signed and numbered please read

This was purchased at an estate sale. The frame and matboard have some issues but the lithograph appears to be in very good condition. It is numbered 278 out of 300 signed in pencil on the lower right. The gallery sticker fell off the back but it was purchased at Collector’s fine arts and gifts Mayfield Ohio. This business has since closed. I had every intention of having it reframed but since it has been stored for many years I’ve decided to sell it and let someone else appreciate it. Erte was born Romain Tirtoff in 1892 and died 1990. Famous for his art nouveau and art deco work. This piece is titled Elegance. Believed to be circa 1975 but I couldn’t quite pin down the exact date. It seems to have been from a series of lithographs that were limited to 300 pieces each. Thank you for looking Reasonable offers are always appreciated!