Household testing meter for continuity and batteries.
The top is substantially faded, due to exposure to sunlight.
The original polystyrene packing is complete and undamaged (top part is underneath the box in this picture).
The meter and original test leads are inside, with the instruction book underneath the meter.
The instructions are the same size as the meter itself, and printed on brightly coloured paper.
The instruction book can be downloaded, scanned from the original:
PDF file, 5.2MB, 26 pages
The black lead has a metal crocodile clip, the red an insulated plastic probe with spring loaded tip.
The PVC insulation has been damaged due to being stored in contact with the polystyrene packaging.
It fits into the main meter for storage.
When plugged into a working socket, both neons should illuminate - one only suggests some problem.
These neon devices are of limited use, as they can only show certain types of fault.
The green section is for continuity.
The black knob below the meter is to set the full scale deflection.
Power switch is located above the meter, with a red LED at top right as a power on indicator.
Sockets below the meter are for the supplied test lead, with several contact studs for testing fuses and torch bulbs.
The mains socket is marked 'Appliance Test' although this only checks for continuity.
A video showing the internals of this device and it actually working can be found in the Product Teardowns section.