It was stolen from a garden of a house in Kirk Deighton, between 7pm on Friday 14 June and 9.30am on Saturday 15 June 2013.
The bronze sculpture is of two dancing hares and is one of a limited edition of thirteen. It is valued at around £25,000.
PC Charlie Ferguson, of Harrogate Safer Neighbourhood Team, said:
If you have seen the sculpture since the theft, I ask that you contact the police straight away.
I am particularly keen to speak to anyone who has been offered the item for purchase, such as art or scrap metal dealers, and ask that they get in touch.
Anyone who can assist with this investigation is asked to contact Harrogate police on 101, select option 2 and ask for Charlie Ferguson. Alternatively information can be emailed to firstname.lastname@example.org.
Or call Crimestoppers anonymously on 0800 555 111 quoting reference number 12130097758.