You had me at Convair.
Over to you dash7fan.
As I understand, it's a Convair VC-131D configured to look like a TAA Convair 340.
VH-TAA Convair 340-67
The guide that showed us through the aircraft related a story how it was previously owned by a South African railway magnate that decked out the interior to look like a railway carriage - including the toilet.
