3.Quartet No.16 in E flat,K 428,421b 4.Quartet No.17 in B flat,K 458 'Hunt' 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 String Quartet No.16 in E flat major,K.428 String quartet no. 6 in B flat, op. 18 no. 6