Hello again Itsik,

The items presented appears to be offset lithograph prints after early 20th century chromolithograph posters published by Officine Grafiche Ricordi. Each print is noted "facsimile di manifesto stampato nel DATE dalle Officine Grafiche Ricordi" to the margins, translating to facsimile of a poster print in DATE by Officine Grafiche Ricordi. It appears the MF notations are inventory numbers for the printers.

The estimate provided is based on recent auction estimates and results of offset reproduction prints after original 1910s - 1920s Art Nouveau poster by Officine Grafiche Ricordi. Thank you for your appraisal inquiries with Mearto. Please take care