I have so many questions.
It's a gimmick. Might be useful for mando players crossing over to fiddle. Possibly fun for campfire outings or for show-and-tell at summer camp.
One of my students 3d-printed one of these for me. It's interesting when playing repeated chords.
One could the have a shorter violin case for air travel..
The next step is for someone to compose a set of virtuoso etudes and caprices specifically for this bow. :)
Trevor, I'll take care of that.
The link in Nina's last post can be enlarged using the Windows 10 Magnifier (the Windows key on the bottom row of the keyboard in conjunction with the "+" key on the numeric key pad), and using that I can determine that it is Caprice Op 1 in C by Nina Roco. It consists of 7 bars of the low B on the G string, apparently to be played on one bow (I can't quite make out the instructions above the stave at the beginning - it's blurred at that magnification).
Reminds me of the "frosch bow" that a violin teacher friend of mine had made. It is about 20 cm long an she lends it for a few weeks to pupils who have difficulties playing in the lower third of the bow (and takes away their own bow for the loan period).