The career of Johann Christian Bach, the youngest son of Johann Sebastian, followed in a general way the same route as that of Handel: Germany to Italy to England. Arriving in England in 1762, three years after Handel's death, J. C. Bach established himself as a popular composer of operas and instrumental works in an early Classical style. It was early in his London years that he was visited by the eight year old Mozart, who was greatly influenced by his music. Mozart's earliest piano concertos were arrangements of Bach's keyboard sonatas, and he esteemed "the London Bach" throughout his life.
Bach's concertos that make up his Opus 7 were published in 1770 under the title Six Concertos for the Harpsichord or Piano Forte with Accompaniments for Two Violins & a Violoncello. In that transitional time between the harpsichord and the piano, it was not uncommon to advertise works as being for either instrument. On the one hand, it could increase sales to people who did not yet have the new pianos, but it also reflected the fact that the piano had not yet developed an idiomatic style distinct from that of the harpsichord.