69 seat help needed

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Seat looks like maybe a recover at some point- but interestingly it has a tag on back that read "8-24-70" although the truck is a 69. Maybe it was replaced at some point but I dunno. I have included some pics of the seat in the album in hopes of getting some advice and help about rebuilding it. I think it is missing a large spring on the bottom, and the lever is broken that moves position- and that side seems stuck in place. Not sure what the mechanism should look like factory. Any help on what I may be missing so I know what to ask for on the classified boards would be great. Would like to tackle a re-cover myself- and read the 72 bench rebuild thread here with interest. Can someone tell me if I need another large spring on the bottom passenger side? Does the passenger side rod end need a spring and retainer clip like the drivers side has? And how can you decode the metal tag on back?