A simple image titled Pony by British artist Patrick Caulfield is the highest-estimated lot ever to be offered at south London saleroom Roseberys.
The 1964 work is guided at £300,000-500,000 at the September 26 sale taking place in the West Norwood saleroom.
Pony comes from a key period in Caulfield’s career and is being offered for sale for the first time on the open market since its original purchase directly from the artist in the year of its conception.