The Bar-Lock typewriter is a patented design by the inventor and lawyer Charles Spiro in 1888. The presented model 10, was produced from 1900, under the brand Columbia Bar-Lock (in the United States) and Royal Bar-Lock in the British market. The keyboard used in the presented model is full, provided with 78 typing keys and one function key. The keyboard, constructed in this way, was adapted to English characters. For the needs of the non-English market, machines were produced with a set of 86 keys and only under the Royal Bar-Lock brand.
The Marconi radio set is a high quality luxury battery-operated radio set produced by Polskie Zakłady Marconi S.A. This Warsaw branch of the Marconi Wireless Telegraph Company Ltd. London, the company established by the undisputed inventor of radiophony, Guglielmo Marconi, was established in 1928.
Osa M50 oraz M52 to jedyne w historii polskiej motoryzacji seryjnie produkowane skutery. Prace nad stworzeniem polskiego skutera były prowadzone w Dziale Postępu i Sportu Warszawskiej Fabryki Motocykli przez inżynierów Krzysztofa Bruna, Jerzego Jankowskiego i Tadeusza Mathia już od 1951 roku.