AMSTERDAM, Netherlands - The Van Gogh Museum has unveiled its latest addition by the tormented artist -- an 1882 water colour of a pollard willow under a cloudy grey sky from his early Dutch period.

The museum bought the painting at auction in London earlier this year for C1.58 million (US$2.05 million).

Museum director Axel Rueger on Thursday called the painting "one of the most representative water colours from Van Gogh's Hague period."

As one of the painter's first dabblings with colour, the landscape is a far cry from the exuberant and colorful postimpressionist oil paintings that characterized Van Gogh's later works.

At the time, Van Gogh was still honing his skills in perspective, anatomy and proportion using black and white pencil and pen sketches.