If you're referring to the acoustic instrumental "Bron-Yr-Aur", on "Physical Graffiti", no idea, although he tended to use Martin acoustic guitars. He also played that one in an alternate open-C tuning that he most likely copped from another British folk guitarist, Davey Graham and Bert Jansch are likely suspects.
If it's the electric "Stomp" you mean, again, no idea, but as teeny states he favored Gibson Les Pauls, and old ones at that (eg: '50's).
― Nom De Plume (Nom De Plume), Saturday, 24 January 2004 21:10 (twenty-two years ago)