The Britten Norman BN2 Islander. Launched GW-2 1st of March 1963. Still in production (real world) in Portsmouth UK in it's pretty basic form as a real jungle Airplane, rugged and reliable as you'd expect from a private venture for the UK Army to deliver troops and supplies to remote areas.
It was developed into the Tri-Lander later and there is one is still flying EGHI - EGJJ daily. Noisy and slow it may be, but the company, founded by a 18yr? old a couple of years ago, is still operating.