A reward of £50,000 has been offered for information on the theft of a bronze sculpture said to be worth £3m.
The 7ft tall Standing Figure was one of four Henry Moore pieces on display at Glenkiln Sculpture Park near Shawhead, in Dumfries and Galloway.
It was stolen from the park last October. Experts fear it may have been sold as scrap metal.
The reward has been offered by local landowner Sir Henry Keswick, who created the sculpture park.
It came as police launched a fresh appeal for information on the theft.
At the time of the theft, officers said a blue Ford Transit-style van and its three occupants were seen at the park on two occasions before the artwork was taken.
The men were described as being in their 20s or 30s, of average height and build. One had ginger, shaven hair and was wearing a red or orange waterproof jacket.
The men had a collie-type dog and the van was described as being an unusual shade of blue.
Police Scotland said the men may have had legitimate business in the area and appealed for them to contact the force.