\score{
  \notes\relative c'\context GrandStaff{

c4 d e f | 
g a b c | \break
\property GrandStaff.instr = "Div."
<{d c b a | 
  g f e d}
 \context Staff=lower{
  b' a g f |
  e d c b |}> \break
\property GrandStaff.instr \unset
c1
}
\paper{
  \translator{
    \GrandStaffContext
    \consists "Instrument_name_engraver"
  }
}
}