A serigraph print of three dimensional shapes in the style of 1960's "Op Art", hand signed at lower right by artist Martha Jacobsen and titled at lower left "Sea Dream". The work to the unaided eye appears to be an original drawing but magnification reveals the tell-tale clues to the silkscreen process. The black paper sheet measures 27 1/2" by 21 1/2" and is unframed (there is 1/8" Plexi sheet that protects it). At lower left is evidence of a repaired dog-leg shaped 8 or 9" tear, (taped on the reverse). It appears now almost as a crease rather than a tear; two other taped areas on reverse correspond to short edge tears, and extreme lower left corner is missing. I do not see information on an artist by this name. Cropped for framing, about 60% of the dog-leg tear would be hidden, and other flaws would be hidden completely from view. A modern image that from normal viewing distance appears as an original work roughly in the famous "Op Art" style popularized by Vasarely and others.