@Sunfish...
No problem with what you said Sunny and I totally agree that mention of a "Tag" or the actual "string of letters and numbers" upon it , if mentioned in an official signal or document would suffice to 'hold the water'. Certainly, that is what we have been looking for as well as the tag itself.... and are still looking, there is s query still active at College Park in WAS by a researcher there but nothing has yet been found in the AWM here. It is not generally known that the AWM has only carbon copies of a lot of signals from the WWII New Guinea Operations and the originals were left behind in Port Moresby and ended up in the wooden RSL Building in Moresby. When I started on this and was working at Air Niugini, long time staff there told me that they had been to the RSL in Moresby and used to sit and read the WWII Messages and SITREPS while having a beer at the RSL. This building and all the WWII Documents in it, went up in smoke when the RSL Building caught fire.
@CONSO
Thanks for info, hopefully the letter is captured in this post....and it is !