In 1908 Edison increased the playing time of the cylinders. From
1888-1902 the speed of the records varied so the record could
fit the song, anywhere from 90-144rpm. After 1902 the speed was
standardized at 160rpm. In 1908 Edison cylinders... The Edison
Triumph Model D pre-dates the Edison Opera. The lightweight,
freestanding horn is something of a wonder in that there is no
need for a crane to support the horn. Notice the wax cylinder
being used on this instrument.