RCA 4AA 1928 - Microphone see more
© Francisco Matias
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RCA 4AA 1928 - Microphone
Also in 1928
- 2 of October - The "Prelature of the Holy Cross and the Work of God", commonly known as Opus Dei, is founded by Saint Josemaría Escrivá.
- 7 of May - The Jinan incident begins with Japanese forces killing the Chinese negotiating team in Jinan, China, and going on to kill over 2,000 Chinese civilians in the following days.
- 14 of April - The Bremen, a German Junkers W 33 type aircraft, reaches Greenly Island, Canada - the first successful transatlantic aeroplane flight from east to west.