Hi Lakshya,

Thank you for contacting Mearto with your appraisal inquiry.
This appears to be one of Picasso's Cannes Exhibition posters; these come to auction from time to time and bring prices from $600-$2,000 depending on the edition. This is an atypical color palette.
Based on the photos and information provided, and subject to examination, this is:

Lithograph designed by Pablo Picasso, advertising a 1956 exhibition of his work at Galerie 65 Cannes.
Possibly heightened by pastel, possibly laid down to cardboard.
28 by 20 inches
CONDITION: Not examined out of the frame. Client represents this to be in good condition.
PROVENANCE: Acquired at a flea market.
£ 1,000-1,500*
*represents a fair-market value for auction purposes; retail or asking price may vary.

Please let us know if you have additional items to appraise, or questions/concerns, and thank you again for using Mearto.
~ Delia