I never knew this existed until I saw it, then I had to have one, and then I had to buy a cartridge to go with it
I will be testing it soon, most likely with the Ferguson 3840 portable black and white TV
Testing complete

It's a similar form factor to other Grandstand consoles, I didn't realise it never came with a cartridge, because I don't tend to read the whole listing, so back to ebay to find one and they're common enough, so I got the cartridge that came bundled with the console for pennies

The base of the unit with the model number

The battery compartment

This one does have the external rifle connector

The rear with RF lead and external PSU socket

The cartridge slot with plastic cover, you'll note the "PC-Series" text, this is because the console and it's rebadged clones were known as PC-50x and were considered to be part of the first generation of video game consoles

The control panel

The cartridge, these contained a version of the General Instruments AY-3-8xxx range of Pong-on-a-chip IC's, there is no CPU in the console

With the cartridge installed

The cartridge box, this is the most common as it was bundled with the console

You'll get a blank screen with no cartridge installed, and when the cartridge is installed but before you select a game

Happily this one works great, except the left controller is unresponsive
Squash
Basketball
J - Invalid I/O device, 710:1