Next week, the first three Led Zeppelin albums get the deluxe reissue treatment, which promises to unleash a bevy of unheard material into the rock ether. Today, a new previously unheard instrumental called "La La" has surfaced.

The unfinished track was recorded in 1969 and actually sounds very little like Zeppelin at all until the last minute. This song will appear on the Led Zeppelin II reissue. Check it out in all its hissy, sick guitar glory below.