All I've got is a picture of the Servus 7771 terminal, which was apparently used to access the Servus 100 host (whose manual is visible on the photo):
There appears to be nothing on the web about this machine (at least not via Google).
I found two mentions of the Servus 100 in publications archived at Bitsavers, both in survey publications of small business minicomputers from 1973:
Putting these together, I get the following picture:
The Servus 100 was a 16 bit minicomputer made by CNA/systems, based on the Lockheed SUE ("System-User-Engineered minicomputer") platform. It came with 8K to 32K words of core memory and up to 20M words of disk storage and ran at 1 MHz.
Its operating system was called "DOS" (which only tells us that people weren't very imaginative naming their operating systems back then), and it could be programmed in RPG or Fortran; it was apparently marketed especially at insurance agencies. You could lease it for $1000 per month, which is equivalent to about $7000 in today's money.
There was no mention of the Servus 100 before or after 1973, so it probably wasn't a very successful machine.