String quartet no. 12 in E flat, op. 127 String Quartet No.12 in E flat Op.127 String Quartet No.12 in E flat,Op.127 String quartet No.1 in E flat Op.12 String quartet No.13 in B flat Op.130 String quartets No 12 in E flat, Op. 127 String quartet No.3 in B flat Op.67 String quartets NO.12 in E flat major op.127 String quartet no. 12 in E-flat major, op. 127 String quartet No. 12 in E-flat major op. 127