[ Ref. MMD 980616, 980617 ]
> 1. How wide is the music roll? The American-style roll is
> 11.25 inches (28.6 cm) wide.
> 2. What is the distance between the holes in the tracker bar?
> The American style after circa 1910 is exactly 9 holes in 1 inch
> (approximately 7 holes in 2 cm). The earlier American style plays
> only 65 keys; it has exactly 6 holes in 1 inch (approximately 7 holes
> in 3 cm).
7 Holes in 2 Cm
> 3. How many holes in the tracker bar?
> I hope that you have some music rolls for the piano. In the 1920s
> music rolls were made in Australia, USA, Mexico, England, Germany,
> Spain and Italy -- all with the "Hit Songs of the World" !
> Best wishes,
> Robbie Rhodes, MMD
Total 80 Holes
The material of the tracker bar is brass.