I found a photo of an aircraft showing registration NX312TJ. When I looked on this website, I found the aircraft, one photo with this registration and 3 older photos showing it without the X. Checking the web I found that before 1948 NXnnn registrations indicated Experimental, but since then, only Nnnnn was used.
As an Aussie, can you please advise how an aircraft photographed in 2016 can have an NXnnn registration.
Regards,
Peter.