This is an original AUTHENTIC VINTAGE, hand signed art piece by the American Architect and Sculptor DAVID ENGDAHL . The "60" REPRESENTS THE PIECE NUMBER OR SERIAL NUMBER WITHIN HIS SERIES OF SCULPTURES. The "81" MEANS THE YEAR THE SCULPTURE WAS CREATED (1981). His work is known for creating intricate, organic sculptures by laminating fine layers of wood and hand-carving them into fluid flowing shapes. His collections are featured in major permanent collections across the US including the Museum of Contemporary Art. Has minor surface scratches on base (as seen in the photo)