Quartet No.6 in B flat,K 159 Quartet No.11 in E flat,K 171 Quartet No.12 in B flat,K 172 Quartet No.7 in E flat,K 160,159a 2.Quartet No.22 in B flat,K 589 Quartet no. 2 in B flat major Piano quartet No. 2 in E flat, K493 3.Quartet No.16 in E flat,K 428,421b String quartet no. 12 in E flat, op. 127 Quartet no.1 in E flat major, op.12