Now i have said it.
*sigh of relief*
Imre Simon's Szigony Müszaki Vállalat was Qualital Konnyüfémipari Feldolgozó Vállalat's sole retailer for these machines... But it is worth noticing that it also was the business to contact in case a machine needed servicing, even if the machines were manufactured by other businesses.
Yet another leaflet:
Such a joy to witness these artefacts of the past surface from unforeseen nowhere!
Other leaflet of the Kiskőrösi Vegyes Kisipari Termelőszövetkezet here