String quartet no. 12 in E flat, op. 127 String quartets No 12 in E flat, Op. 127 String quartets No 13 in B flat, Op. 130 String Quartet No.12 in E flat,Op.127 String quartet no. 12 in E-flat major, op. 127 String quartet No. 12 in E-flat major op. 127 String quartet no. 1 in E flat major, op. 12 String quartets NO.12 in E flat major op.127 String quartet No. 1 in E flat major, op. 12 String quartet no. 6 in B flat, op. 18 no. 6