Happy 40th birthday to the Sinclair ZX81!

The ZX81 was launched on 5 March 1981 in two versions (though with identical components) – a pre-assembled machine or a cheaper kit version, which the user could assemble himself.

Both versions were manufactured in Dundee, Scotland by Timex Corporation at the company’s Dryburgh factory.

I have a ZX 81 in my collection, and I have made a couple of videos about it long time ago.

Here is one of those: