Symphony no.43 in E flat major, "Mercury" Symphony No.43 in E flat major 'Mercury' Symphony No. 43 in E flat major : "Merkur" Symphony no.4 in B flat major, op.60 symphony No.3 in E flat major, Op.55 Symphony No.4 in B flat major, Op.60 Symphony No.4 in B flat major, op.60 Symphony no.1 in A flat major, op. 55 Symphony no.2 in E flat major, op. 63 Symphony no.33 in B-flat major, K.319