Set to appear on eBay as a charity auction, the Hagstrom was owned by Kurt from late 1992 until his death in April 1994, after which Courtney Love gave the guitar to a close friend - a member of another Seattle grunge band, apparently - before it ended up in the hands of Portland-based collector, Nathan Fasold.
The guitar has been authenticated by Nirvana tech Earnie Bailey, who hand-delivered the Hagstrom to Cobain in Seattle in 1992 and converted the guitar to a left-handed orientation.
Vintage guitar expert George Gruhn has identified the model as a 1958-1960 Hagstrom Deluxe Model 90.
The guitar goes up for auction on eBay tomorrow and runs for 10 days, ending on 26 February. Proceeds will go to Transition Projects, a Portland-based nonprofit that helps more than 10,000 people every year transition from homelessness to housing.
This isn't the first Cobain guitar to go under the hammer in the past year; other recent auctions include a Fender Stratocaster, played on the final Nirvana tour, as well as a smashed 1989 Univox.
For a closer look at Kurt's gear, check out our guide to his key guitars in Nirvana.