A Stephen Lyman Artist Proof is a separate edition from the main edition of a print release. Artist Proofs are printed at the same time as the main edition, thereby maintaining a consistent quality throughout both editions. Artist Proof editions are numbered separately from the main edition and the size of the edition is comparatively small. Each Artist Proof was signed by Stephen before his death and subsequently signed by his widow Andrea Lyman. Stephen Lyman Artist Proofs are not generally released for purchase except for a very limited quantity made available through Stephen’s family. The fact that an artist proof is a special subset edition, a small edition size, and usually only available from the artist, increases its rarity value.