IBM 3270 Hardware User's Guide

Or this:
5271
System
Unit
5151 Monochrome Display
5271 Keyboard
You should try to arrange the units so that the
top of the display is at eye~level. If the units are
too heavy, have someone else help you move
them.
2~34 Book 1 ~ 3270 PC Work Station User's Guide

IBM 3270 Specifications

General

Brand	IBM
Model	3270
Category	Desktop
Language	English