DR-Helios 751 Comp Lim ?

[r2d2]

While Googling for varoius things
found a D&R ST1600 console for sale that have onboard (on the pictures)
but if not wrong also available for sale apart a pair of comp lim
branded "DR-Helios" 751 comp lim
it was a partnership of the 70's between the 2 companies ?

would be worth a diy , or already exist here somewhere ?
thanks everyone for info about !

 

[hageir]

If it's any help I've been researching Raindirk (bought some old strips/modules) and one of the consoles had an option for a pair of ADR Compex Limiters on one the groups. ADR seems to have been licensing/lending their designs / collaborating
Here's some info:

https://gearspace.com/board/geekzone/1307346-raindirk-1973-mixer-mod-adr-f760-comps-bad-idea.html
https://gearspace.com/board/so-much-gear-so-little-time/1195296-raindirk-eela-adr.html