Work, Mozart, and Classical: when none of the sharp keys work on your clavier Klavierstück in C Major KV 9a (5a) W.A.MOZART Entstanden wahrscheinlich 1764*) Allegro clavier machine broke

Work, Mozart, and Classical: when none of the sharp keys work on your
 clavier
 Klavierstück in C Major
 KV 9a (5a)
 W.A.MOZART
 Entstanden wahrscheinlich 1764*)
 Allegro
clavier machine broke