IMO, it's an obvious refin. if you look at the edges of the body, you can see that they are rounded over. from '51-'54, the slab bodied p basses had an almost sharp edge and the sides were pretty flat.
here's a pic to show what i mean:
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Yep, I'd bet that's what it used to look like! It might be a nice instrument nonetheless, but at that price?? ...I dunno...