The game is among collectors known as "cardiogram". The game originally came from a seller from England and it carries the CGL logo. CGL stands for Computer Games Limited. CGL was a company based in London and it was the distributor of Game&Watch and other handheld brands in the UK.

Update January 28th 2018: The Plessey Company plc was a British-based international electronics, defence and telecommunications company, originated in 1917. In 1989, it was taken over by a consortium formed by GEC and Siemens which split the assets of the Plessey group.
Source and more information about Plessey: Wiki

Matey is a fictitious word and stands for "ami / matelot", a company which manufactured soaps and shampoos for children in English speaking countries by that time. Picture of the box

03/07/2020 Update:

The true story being that these games were given out as xmas gifts to associates and workers of the photographic company who specialised in retouching photos for advertising agencies called Lifeboat/matey who were based in the Saatchi & Saatchi building in Whitmore street, London.

A owner of this game said, he was given it at xmas in 1993, at the time he was working for a big advertising agency on a project involving an 90s band called 'Cockteau twins', Lifeboat/matey were in the process of retouching photos for one of their album covers which the company he worked for was doing the advertising for, he actually said that he'd put it in a drawer and forgot about until now as he's moving house.

Lifeboat/matey as well as being in Saatchi & Saatchi's main building also worked with them on a lot of projects, they then merged with admagic and at some point bought out by another advertising company called TAG.

Thanks a lot to Tony Liversidge for providing this information.

The previous owner got the game back in 1982. The Plessey Company plc was a British-based international electronics, defence and telecommunications company, originated in 1917. In 1989, it was taken over by a consortium formed by GEC and Siemens which split the assets of the Plessey group.
Source and more information about Plessey: Wiki

Nothing known.
Picture 2

There are no information on this company/brand known yet.
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