I am looking for information on a picture I recently purchased, here are some of the specifics:

Brightly colored, numbered, stamped, and signed
Authenticity Tag on back: Verifies original lithograph - The Collectors Guild, NYC & Paris
Measures: 22.5" X 17.5" (not sure how much of border is under matting)

Do you know anything about when it was created? Or perhaps you could include a picture. Some artists can be identified by their style of art better than by the specs of the picture.