[78-L] His Master's Voice labels - small number?

[Julian Vein]

Matthew Duncan wrote:
> They are often referred to as 'control numbers' and I think they were assigned 
> in the pressing process but I don't know why as the matrix number could have 
> done the same job?!
> 
> Matthew.
================
Are there examples of where sides with widely varying matrix numbers 
have consecutive "control" numbers? If so, this could mean that they 
were some form of filing system, cross-referenced to the matrix numbers. 
Copies of discs with consecutive "control" numbers would be easier to 
store on shelves than  non-consecutive matrix nos.

      Julian Vein