Even though these were all manufactured by Convergent Technologies, this one is actually BRANDED by Convergent, as their model S/50.
And there's software included here. I tried to buy myself, but just missed it.
I'd really like to connect with the buyer here, to see if we can do a more expansive documentation project on this machine, as well as an archival of the software that was included.
As far as I know, this is the only Convergent S/50 I've ever seen that has survived, especially with all the CONVERGENT software and manuals (vs the AT&T ones)!