Dear Jean-Claude,

Thank you for contacting Mearto with your appraisal inquiry.

The presented object appears to be a print on wood with the measurements of 450 x 360 mm. This print was made after the famous painting by Frans Hals with the title "Laughing Cavalier" (https://en.wikipedia.org/wiki/Laughing_Cavalier). The surface is gridded, plain and no brush strokes are visible. This indicates that this is a print in a transfer technique and this piece was made in the third quarter of the 20th century.
This piece is in good condition and there is no serious damage visible in the images provided.
A fair market estimation would be between 20 to 40 USD.
This estimate is based on actual recent past recorded auction sales of comparable items. Retail "asking prices" can be higher and may vary.

With kind regards,
George