I can answer questions about the authenticity of graphic prints by M. C. Escher (Dutch 1898 - 1972. I can possibly help with evaluation, buying and selling M. C. Escher prints. PLEASE NOTE THAT MY EXPERTISE IS IN ARTWORK BY M. C. ESCHER ONLY.
I have been a collector and dealer in works by M. C. Escher for over 30, and my gallery in Connecticut is the only permanent retail gallery exhibiting and offering M. C. Escher's original artwork. For reference, see my websites www.escher.info and www.artistsmarket.com
Honors degree in Art History, UConn 1975, respected speaker and author concerning M. C. Escher's work for over 30 years.