Quartet No.11 in E flat,K 171 Quartet No.12 in B flat,K 172 Quartet No.6 in B flat,K 159 Quartet no. 2 in B flat major Quartet no.1 in E flat major, op.12 String quartet no. 12 in E flat, op. 127 Quartet no. 1 in F major Piano quartet No. 2 in E flat, K493 String Quartet No.12 in E flat,Op.127 String Quartet No.1 in E flat, Op.12