If genuine then the reception of the ZMS/B beacon by PU2XIZ, and passed on by PY2DS on the phone, PY2DS feels he heard the CW and there is a very valid chance it's a true copy.
It was possibly tropo enhanced TEP and that is being investigated using modern analysis software.
Part of the beacon sequence is clear on the recording, but not all of it.
I am sure we will hear more about this remarkble claim in due course. AO7 (I think) showed that long distances were possible on 144MHz but not much has been reported in recent years.
Whilst I feel there are still some questions about the authenticity of this report, if proved true then it should be possible to work some truly long distances on VHF by carefully observing Hepburn and the F5LEN propagation web pages and acting on those that seem to offer good possibilities.