Hello. I recently showcased what I thought was a Ken, due to one appraisal, however this may be incorrect as was pointed out by several members of this forum, and as such I am going to say that it is an odd kaiken, and assume that it is most likely Edo Period, due to the design of the habaki which is copper, wrapped in silver.
This piece is very small, with the entire length being 8.2cm, though does look quite nice for its size, at least in my opinion. It is in shirasaya, and has a suguha hamon.
It is mumei. It also appears to have had some material removed in the past, most likely to mitigate rust pitting.
The blade is tired, though has no active rust, from what I can tell. It is not papered.
It is quite an interesting piece, though I do not expect to get much for it. I do not have a set price for it, so please feel free to send me offers of what you think it would be worth. I would prefer a trade over a sale, however. I hope to get at least $200 for it.
Images: https://imgur.io/a/PeNGViN
Will ship to anywhere.
Payment can be done through PayPal.
Currency is USD.