[78-L] constant velocity records, was Value of 78's

[joe@salerno.com]

the World label was available at least during 1923 and 1924 and are 
almost totally unique
> among 78s produced for commercial sale: they are not meant to play at a consistent
> speed!  In order to keep the velocity of the record consistent, a special mechanism was
> attached to the gramophone to speed up the record as the soundbox moved over it. 

has anyone ever figured out a speed change formula for transferring a 
constant velocity record?

Or is it dependent on the record size or something?

joe salerno