Dear Carola,

Thank you for your request. This is a print after a painting by the famous British artist John Constable (1776-1837) with the measurements of 21 to 26 inches. The used technique is probably a color lithograph which is often used for reproductions of paintings. These reproductions come into vogue in the late 19th century. The thought behind is that also poorer people can afford art and enjoy the paintings. This print is published under the name of a series "Gems In Art" which fits the described thought. It was made in the 20th century.
An estimation would be between 40 to 80 USD.
This estimation is based on actual recent past recorded auction sales of comparables. Retail "asking prices" can be higher and vary.

With best regards,
Georg