[78-L] Columbia T series and Argentine issues

[Han Enderman]

Can someone give some info about the Columbia T series?
It dates from the 1910s and starts with T-1.
T-6 is mx 086017, Aida, by Romeo Berti.

T-97 is El Camamau by Banda Espanola, and after that the series is South American music.
Many issues are in a 55000-59000 mx series.
E.g., 55879 Los Gobbi: El Dentista Moderno, on T-437.
Mx 59102 by Arturo A. Mathon on T-862 (with flag label).
I assume these records were for sale in the US.

There were also issues with labels listing "Patentes Brazileiras".
Apparently these were pressed & printed in the US. 
For export only? Can this be confirmed?
Since there are no Argentine patents mentioned, were these "brazilian" issues
distributed over whole South America?
Related common issues are the Argentine(?) "Disco Doble Columbia" by
Orquesta Tipica "Pacho", J.Maglio, dir., with Maglio picture labels.
Logo gives "Notense las Notas" (is this Spanish, i.e. for use in Argentina?).
For ex., TX 759 with mx 57198 Jeanne.
Were these records pressed in the US with these labels?

When did record pressing start in Argentina?
Were the many Argentine scroll Victors pressed there or imported?

Han Enderman