After checking the images on pcgs, these are the only 2 dies they have imaged ..
Here's 3 images from pcgs and all are different dies too . None match OP coin, which is a good thing, I guess. There's also 3 images of poofs, I...
I'll do a graph on a BS coin .
Here's the 2 proof dies together . [ATTACH]
Here's another graph with the Proof coin the OP posted, still doesn't match, but that makes 2 obverse dies so far, for the 1885 proof coin . [ATTACH]
I would think there's only one master hub, but I don't collect these ...
I not sure on how many dies were used, but there was only a small amount of proof coins made ...
Here's a full graph of the date comparison . [ATTACH]
As a variety collector I have some good tools in my tool box . Here's a little graph to check date placement . Not even close to the proof...
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