Awful polish, habuchi is not visible, hadori finish is very sloppy. From what I can see hamon seems nioi-based, not exactly typical for earlier blades. Not chikei, but layers, probably exposed by acid.
This came from daimyou54eb on eBay - he is known to carry rather low-end items, but occasionally also good stuff (I recall a story about a good Hizen sword bought from him). But that is not a kantei point
Interesting puzzle indeed, but in the current state of polish I would not jump to any conclusions. Do I see the remnant of a signature below the lower mekugi ana?