Looks to be marked 17/18, e. a. Luise Wulff  75. meaning Artists Proof. See pics for condition. Measures approx 21h x 18w x 3d inches. E-6680
the piece is a traditional intaglio print (likely a copper plate etching or aquatint)
Luise Wulf Luise Wulff (19351993) is recognized for her fine-line graphic works, prints, and book illustrations. Because an edition size of only 18 is incredibly tight for a lithograph, your 17/18 print is a rare find from her mid-1970s era
Value 100-300