The prototype L-420 (actual type - L410UVP-E20) came to the Australian International Airshow, operated by manufacturer LET Kunovice. It was later registered in the USA as N420LW, later N420Y, and five years later returned to Australia in this guise on another demonstration tour. Sadly this came to nothing and in 2001 the aircraft was exported to South Africa as ZS-OSE. So far, it appears to be the only L-420 built.
This photo was added on 22 February 2018, and has since been viewed 62 times.