Hi Tunde.
Welcome to the forum.
I don't think the UK market ever received the Bosch keyplate controlled model so, on that assumption, your old machine will have been a Hoover Keymatic for sure. Question is, which one?
There were a number of models, across a number of different ranges and sold new from 1961 through to 1982.
I was going to post a link to an old thread detailing all Hoover models made over 30 years from 1961 to 1991, but that would be a bit cruel making you trawl through all that (let me know if you do want to look through the thread and I will post the link separately).
To simplify your search, I have posted images of all the Keymatic models that Hoover made and sold in the UK. It should be one of the following models (note that the photos are posted in the order they appear in the list below):
3224
3226 ... these were slant fronted machines, with angled drums and an impellar at the back of the drum
3203
3203H (models 3203 and 3203H were visually identical)
3223H ... these models were built with a wider than usual bodyshell
3243H version 1
3243H version 2 (version 2 had colour changes over version 1)
A3050 ... these three models were from the 'Matchbox' range, the A3050, being an exclusive model, only available to buy at Electricity Board Shops
A3008 ... this was from the 'Superstyle' range
A3062 ... this was from the 'New Magic' range
& finally
A3112 ... this was from the 'Smoother Hoover' range
Let us know if your machine appears then, if we have more images, we can post some for you.
Unless you had an A3050, then the likelihood is that an example of your machine is preserved in someone's collection.
Regards
Paul
