What if a print is signed but not numbered?

If a print is signed but not numbered, it may be an artist’s proof. Also called an AP, an artist’s proof is a print that the artist makes to test the printing process or for personal use and is not intended for sale. A signed but unnumbered print may also be a publisher's proof, a print that the publisher uses to assess image quality during the printing process. Find a wide variety of art prints on 1stDibs.