I found this at a local retirement community trash pick up day, the cushion was disintegrating so i've replace it with a new cushion. I see no Knoll Stickers are markings or any "BR50" anywhere on the chair or base, but someone i know mentioned something about Alcoa making some of the early bases. Any help with this would be appreciated. 
<img class="wpforo-default-image-attachment wpforoimg" src=" http://old.designaddict.com/sites/default/files/forum/IMG_8344. 
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