Masterdisc (6)

Argentinian company producing optical media. Closed in 2016.
Located in Ciudadela, Provincia de Buenos Aires, Argentina.

Their Audio CDs can be recognized by the presence in matrix:
MTDXXXXX MASTERDISC / MTD XXXX MASTERDISC / MTD-XXXX MASTERDISC
XXXX being a sequential number composed by 3 digits (used in 2000), 4 digits (used between 2000 and 2011), or 5 digits (used bewteen 2011 and 2016).
often followed by the release's title and various variations of INDUSTRIA ARGENTINA / IND ARG

When entering this branch in the LCCN section as Pressed by Masterdisc (6), please add in the catalog number field:
MTDXXXX / MTD XXXX / MTD-XXXX (as it appears in matrix).