These two Xerox 860 brochures came with the original letter send from the sales executive.

This is the letter :

IPS Information Letter

And here are the two brochures:

Title : Xerox 860 Information Processing System
Publisher : Xerox
Language : English
Year : 1981
Product : 860 Information Processing System

Title : Xerox 860 Information Processing System:Partial Page Display
Publisher : Xerox
Language : English
Year : 1981
Product : Partial Page Display