I started this thread out of interest as our member "Double Trouble" has just advertised a Fuchs stainless steel side by side for sale in the "Classified Advertisements" forum located here:

Fuchs .577 3 inch stainless steel double rifle

Also I have added the rifle to our Double Rifle Archive forum for future interest:

DR Archive forum - Fuchs .577 3 inch stainless steel double rifle

Both links contain full photos and description.

But here is one photo: