Josef Špaček is a Czech solo violinist and until 2019/20 season a concertmaster of the Czech Philharmonic orchestra. He performs on the c. 1732 “LeBrun; Bouthillard” Guarneri del Gesù violin, generously on loan from Ingles & Hayday.
From Wikipedia (https://en.wikipedia.org/wiki/Josef_Špaček_(violinist)) under Creative Commons Attribution CC-BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0/legalcode)