came across these, front hub is 149 grams, rear 315, its ultraglide, a 6 speed cluster came off of it. date codes are FB for the front and FA for the rear which is '81-'82. But i just cant identify if they are anything significant, or worth building up. the cluster is in very good condition and still has gold plate effect on it.
has more modern shimano logo on hubs, text on side of cassette body says shimano 6D made in japan