The frame is similar to an All Souls but can't tell for sure from those pics.  There were some knock offs of that spring setup from some smaller frame builders back then and I don't recognize that top nut.  And your axle tab should be in the shape of a spade (as in Ace of spades, not a shovel...lol)  Check it against the ad halfway down this link:

http://www.hondachopper.com/gallery_misc/frame_ads/frame_ads.html