The machines were initially designed by Polish inventor Stefan Kudelski, and his company won numerous technical awards for their precision and reliability. Nagra means "[it] will record" in Polish, Kudelski's mother language.
Nagra-brand tape recorders were the de facto standard sound recording systems for motion picture and (non-video) single-camera television production from the 1960s until the 1990s. International espionage created smaller models of the Nagra for high-quality concealed intelligence gathering purposes. Jane Public used it for most of the films made in the 90's. Good times. 'Room tone' tests , very missed.
Bye.