Oh really? I thought this was the right one.
Or is it only the docutech variants?
Yep, there's evidence showing that the 6085 boards use tactile brown. There might be a chance that they used greens, but I don't think this is the case. It's almost certainly only on the Docutech boards.
When I first saw the 6085s, I thought they were the same as the Docutechs, but then I noticed the different product code as well as the lack of a overlay sticker on the top bezel. I thought this was optional, but no, every Docutech has decals over the top function row.
Then I remembered that MAR87 found a Xerox board he said he salvaged SKCM Browns from and I talked to him about it and it did happen to be a Xerox 6085 keyboard.
The eBay seller told me that the latest date on the boards he has is from 1988, so I think it seems pretty unlikely that any of his have greens. Maybe the very very very latest from 1989 have them, but I still find this dubious.