I recently received a request to try help recognizing a certain wakizashi, or at least try to dig up from details.
Apparently, aside from the item being already in germany during the 1930's, there isn't much information.
Here are the pictures and what i can gather from it (i took them, and handled the item personally)
Gallery of closeups, nakago, and the different parts:
http://imgur.com/a/55AtK
Seems like a shinshinto, big kissaki (though i'm not sure if this should be called an o-kissaki, probably not long enough)
Suguha hamon, nakago seems ubu, mumei.
I'd date the mounts (both by style and condition) to very late edo period, tsuba doesn't seem to fit with the rest and might be from a later time, the kozuka seems like someone juts shoved it in there, is a completely wrong size, and probably not related at all to the whole set.
Unfortunately, there is evidence of usage of sand paper quite long ago (rust has already settled on the scratches), and polishing paste not long ago.
Inspection under a magnifying glass didn't reveal any hagire, karasu-guchi or shinae, surprisingly aside from the bad surface condition (rust doesn't seem deep.) the blade looks like it's in very good condition.
If anyone can pour more light on this, or point some mistakes i made in my evaluation (these are just my thoughts- i did not give them out as an advice or something) i'd be glad to receive any help, and every comment is much appreciated.