This is one of the things I wanted to draw ever since I saw the photo... which means for years!
It was very interesting to draw an instrument, especially such a beautiful one like a violin. And yes, I had to use a ruler as a little help :)
The whole drawing was a bit more timeconsuming than I expected and some parts of it were very boring to do (background) ;)
Materials I used:
Bristolboard, actual size 33x24cm
Faber Castell Pencils H, HB, 2B, 5B, 8B
Tombow Mono Zero erasers
Tissues and tortillion
totally 26 hours over several weeks
The beautiful ref is from http://hannahcombs.deviantart.com/
Thanks for looking!