Mechanical Advance distributor Identification help

[Busmoss]

I am new to Model A and B components. Unfortunately for me this distributor data plate has come off and I cant tell what I have here. I see the timing plate says autolite. The back lash and advance springs are so weak that the timing is all over the place. Is this worth fixing?
It is unorthodox, I know, and I have ordered an original manual set up. Could this style even be concidered good for an emergency spare if repaired?
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