Concerto No.6 in B-flat major,BWV 1051 Concerto No.6 in B flat major,BWV 1051 Concerto no.6 in B flat major BWV 1051 Concerto no. 6 in B flat major, BWV 1051 Concerto No.6 in B flat major, BWV 1051 Concerto No.6 in B Flat Major, BWV 1051 7-9.Concerto no. 6 in B flat major, BWV 1051 Concerto No.2 in B-flat major,Op.19 Concerto No.6 in B flat major,KV 238 Concerto no.1 in B flat major, K.207