The rosewood 8 key isn’t mine, unfortunately - but it was so unusual I saved the pics from the auction, maybe 3 years ago? It sold for something like $800. Only thing close to a maker’s mark is the shield, perhaps there’s a significance in the heraldry. I’ve only seen one other 8 key picc go by on eBay, in a batch of junkers. Always found the lack of footjoints - feetjoint? - on piccs and fifes puzzling, is there an acoustic reason for leaving them off? Certainly seems like they’d be that much easier to manipulate.
I have a cocus 6 key piccolo with block mounts, made by Mr. “Improved.” Plays nicely up into the third octave 
but the bottom D is hideously sharp; a fix for this is a ferrule which just happens to fit on the end.
I’ve also a four key fife stamped “Improved,” its Eb key is way too large for the R3 finger. My E Baack flute has the same problem with the C keys, also just now I was putting new pads on a Meyer (no Nach) picc that has dinky keys that the fingers collide with too easily; or it’s sprung too lightly. Most of my all-antique flute collection has reasonably ergonomic keys though.
