I remember watching this on some show on Channel 4 many years back, the show was predominantly about John Zorn and Sonic Youth, was called something like Put the Blood in the Music. Deadly song!
It's a late 60's 12 string Danelectro. As far as I know, he uses the thickest strings available for the high E, B and G strings, and the thinnest ones available for the D, A and E strings. So the whole thing sounds a bit "flat", so to say.