9vspotter:
You may find this of interest. Go to Google search and type in "Nanyang Airways Avro Anson" and the A.J. Jackson Aviation page comes up with a list of Avro Anson registrations for various countries. Scroll down the entries to the VRs and the following is listed.
(1) VR-SDM Avro Anson Nanyang Airways.
(2) VR-SDT Avro Anson Nanyang Airways.
These entries mean that photographs of the two aircraft are available from the Jackson collection. On another page of the Jackson collection entitled "List of Negatives of British Colonial VQ-VR civil aircraft" there are five Ansons shown as registered in Singapore, the three additional Ansons apart from the above are VR-SDK VR-TAQ and VR-TAT. Their ownership is not shown so the mystery of Nanyang Airways deepenes. In all the years I spent living in Singapore and flying for Malayan Airways I never once heard the name Nanyang Airways mentioned. Now after all this time I suppose that's reason enough to wonder who they were and what they did.
Regards
828a