The T4005 was an incredible product for its day. It contained an 11" DVST display and a Graphic Display Controller.  The controller could drive one of 4 displays and in conjunction with software on the host computer could provide scaling, offsetting, magnifying, framing, and augmenting of the graphic output. It operated within an 8K X 8K address space and provided a simple user interface. This T4005 brochure describes some of its features.  Click on the image to view the PDF.

This photo from the brochure shows museum volunteer Richard Stack on the left.

This ad for the T4005 is from the UK Sales Operation in Harpenden.

This video demonstrates some of the capabilities of the T4005.

 

All we have at the museum are two pieces from this historic instrument. This is the control panel cover for the DVST display.

This is the main control panel for operation of the T4005.

The upper right is a rear-lit display panel which shows various status messages.