Is there a manual to accompany the Constant Tone Records made by Victor?
I'm trying to use a partial set of the HMV pressings which have Victor
matrix numbers.  

 

My highest number is record 15 which goes to 8400 hz.  Are there later ones?


 

Perhaps an accurate title will lead me to the right item on the internet
archive.  

 

Anyone have the info?

 

Steve Smolian