sentences:  After Stern died in 2001, both violins were sold at a Tarisio auction in 2003, each violin surpassing the previous record for the highest price paid for a string instrument by a living maker at auction, until the record was broken in October 2013.His clients include Leila Josefowicz, Yo-Yo Ma, David Finckel, Cho-Liang Lin, Maxim Vengerov, Joshua Bell, and the Emerson String Quartet.In their 2008 recording of Bach fugues, the Emerson String Quartet all played Zygmuntowicz instruments.