Country of Manufacturer: USA
Noise Reduction:Dolby S
The Dolby 422 was designed for studio use and in order to get Dolby S, you had to buy a separate card.
These were sold with Dolby B and depending on your preference could be upgraded to Dolby S or C & S by adding one of the two optional 252 boards. XLR connectors
This originally retailed for $4200 and these days are quite hard to find.