A copy of a master tape, generally filed as a protection against the damage or loss of the master tape.
"I received the DVD you made from my PAL formatted laserdisc, and I don’t think better results could have been achieved. The turnaround of one week was also a pleasant facet of the overall transaction. I appreciated the prompt replies to my emailed questions, and the fact that those replies were real and not canned boilerplate. Your price was ..."