Martin D-35 David Gilmour Custom Signature Edition, as new never played. 
This is #117 of 250. 
These signature models was limited to 250 pieces and every label is hand-signed by David himself, ensuring this guitar’s place on every collector’s wish list. Through this partnership, Martin Guitar is proud to support the David Gilmour Charitable Foundation. The David Gilmour signature models are the first D-35s ever made with neck, back and sides of sinker mahogany, chosen by David for its warm, rich tones and exquisitely beautiful grain. Martin have added an Adirondack spruce VINTAGE TONE SYSTEM® (VTS) top for an old-world sound and matched that with antique white binding and vintage gloss finish, Waverly Relic Nickel tuners. A unique neck shape & fingerboard pattern were crafted to David’s specification for this guitar, while a special headstamp is featured on the reverse of the headstock. The signature models are limited to 250 pieces and every label is hand-signed by David himself, ensuring this guitar’s place on every collector’s wish list. 
 
Here is the full description from the Martin Website.
 
https://www.martinguitar.com/guitars/D-35-David-Gilmour.html
 
Dark Sinker Mahogany back, sides and neck. Adirondack Spruce with VTS top. Finished in vintage gloss and antique toner for the top. Scalloped Forward Shifted X Bracing. 25.4” Scale length and 14 fret to the body. D. Gilmour neck profile with a 16” radius Ebony fretboard, 20 frets and a Nut width of 1 11/16’’. Width at the 12th Fret is: 2 1/8’'. Abalone fingerboard inlays, Modern belly Ebony bridge with a compensated bone saddle and 2 1/8’’ string spacing. Bold herringbone top inlay, 28 Multi-stripe rosette and antique white binding. Tortoise pattern pickguard. Headstock Shape: Solid with Square Taper and Diamond Waverly Golden Age Relic Nickel tuners with butter bean knobs. Madagascar Rosewood Headplate with Old Style Overlay script logo. Comes with the blue moulded case and sealed unopened paperwork/package. !! Get this for £20000 by buying direct from the shop with a bank transfer instead of PayPal.