Dreamers’ Circus is a Danish folk/indie band who have been around since 2009, but I have only just discovered them.
Here is an example of their work, featuring the clog fiddle:
“About the clog-fiddle: You take an old clog shoe, cut away the upper part, and put some violin-stuff on top of it, like strings and most notably a violin neck. Popularized in the first decade of the last century by the famous Swedish string trio, Källnatrion, this instrument used to be the poor man’s alternative to the expensive and hard-to-get violin. Now Ale and a handful of other extreme enthusiasts are working hard to bring this noble instrument out to the world to share the masterworks of the clog-fiddle-luthiers från Skåne, Sweden. Ale was titled world champion of the clog fiddle at the 2017 championship in Skåne.”