Sotheby’s has a Francis Bacon double self-portrait for the May sales in New York that is estimated at between $22 and $30m. Among other things, the auction house reminds us that the publication of the catalogue raisonné this year will reveal 100 previously unknown works by the artist. That’s a lot of new supply:

A rare “optimistic” Francis Bacon self-portrait is set to come to auction for the first time in May, having remained in the same private collection since soon after it was painted over forty-five years ago.  Widely acknowledged as the finest self-portrayal Bacon ever produced, Two Studies for a Self-Portrait (1970) will lead Sotheby’s Evening Auction of Contemporary Art in New York on 11 May 2016, with an estimate of US$22-30 million.

While Bacon is renowned for capturing the tortured psychological depths of human existence in his portraits, the overwhelming positivity of Two Studies for a Self-Portrait renders this work almost unique in the artist’s oeuvre. Here we see an elated Francis Bacon on the cusp of his career-defining retrospective at the Grand Palais in 1971 (Bacon was only the second living artist, after Picasso, to be afforded this honour), and in the throes of his relationship with George Dyer, whose suicide a year later was to haunt Bacon (and shape his art) for decades to come.

Little known to the public eye, Two Studies for a Self-Portrait has been exhibited only twice before – first at the acclaimed 1971 Grand Palais retrospective and then most recently at Marlborough Fine Art Small Portrait Studies exhibition in London in 1993. However, perhaps the work’s iconic status lies in the fact it was chosen to adorn the cover of Milan Kundera and France Borel’s definitive book Francis Bacon: Portraits and Self-Portraits, confirming its position at the absolute zenith of Francis Bacon’s most significant and enduring body of work.

2016 is set to be a red-letter year for Francis Bacon with exhibitions of his work planned at the Grimaldi Forum in Monaco (sponsored by Sotheby’s), at Tate Liverpool, and at the Getty Museum in Los Angeles.