The painting, "Rising squall, Hot Wells", is said to be Turner's very first in oil, painted in the late 18th century. Thereafter, the painting disappeared and fell into oblivion.
When it appeared for sale last year, the painting was believed to be painted by Philippe Jacques de Loutherbourg, a French artist Turner socialized with. It was described as "very dirty, not handled for a long time, with a lot of old discolored yellow varnish on it". After the painting was cleaned, it was found to have the signature JMW Turner, writes The Guardian.
Last year, it is believed to have been bid home for around 500 pounds, while it is now valued at 200,000 to 300,000 pounds, equivalent to almost 4 million kronor. Ahead of the sale in early July, the auction firm Sotheby's will exhibit "Rising squall" in London later in June.
Turner is considered Britain's greatest and most influential artist.
