The guitar is a Schecter 'Robert Smith RS-1000' signature model acoustic guitar in gloss black finish, with spruce top, maple body, and rosewood bridge, owned and played by Robert Smith, fingerboard inlaid with stars and moon motif. Lyric notes on paper for 'A Boy I Never Knew' are taped along top side with tuning instructions "DGCFAD" handwritten in silver ink, inscribed on the body by Smith in silver pen "I'd love to see him sleep, I'd love to know him dream... The Cure 2008" additionally signed later "Robert 2013", accompanied by a Gator hardshell case with black plush lining, with masking tape on the outside labelled in black pen 'A Boy I Never Knew, DGCFAD' and inscribed on the case in silver ink 'CURE 2008.
Amaze is very grateful to Robert and his family for this generous donation." (Thanks @guillaume_g_z)
Update (Nov. 25th, 2013): The guitar is up at the Bonhams auction site, and that prompted a very rare tweet from The Cure on Twitter.
A SCHECTER RS 1000 GUITAR IN BLACK GLOSS FINISH OWNED AND PLAYED BY ROBERT SMITH http://t.co/pkcUbyAGK4 pic.twitter.com/k9xSxO9a0K
— The Cure (@thecure) November 25, 2013
Update (Dec. 3rd, 2013): The official site has been updated with this info.
Update (Dec. 18th, 2013): It sold for £22,000 (£27,500 including premium)! Wow! Well done! Thank you to Robert for always being willing to support great causes and charities!
From The Cure on Facebook, Twitter, and TheCure.com: "WOW! THANKS! RSX Lot 403 THE CURE: A SCHECTER RS 1000 GUITAR IN BLACK GLOSS FINISH OWNED AND PLAYED BY ROBERT SMITH, Sold for £27,500 inc. premium"
Update (Dec. 20th, 2013): Nice article about this at The Argus. (Thanks David)