I am now pretty sure that these are the AM2B compressors with a de-esser, not just a de-esser.
This makes it alot more interesting!!!
From what i understand they usually come in 2 modules, with the de-esser on a separate module, that also has a output control.
So these maybe were custom.
Will get some pics of the inside as soon as i can!
Thanks for all the input!
Regards,
API