Solid, well made reliable Aussie built hubs.
Looks like they're the most recent build, which is good. They went through a change of owners, I think early 2000s and some changes were made to known issues in the rear hubs.
The fronts are pretty straight forward, a mate is still running one of my old ones, which was the original company.
My nephew is still running one of the newer rear hubs right now and haven't had any issues with it at all in over 10 years of use. Easy to service and they've had one change of bearings (standard bearings) in that time and still rolling strong and smooth to this day.
You might have some issues getting spare parts, but hopefully you won't need them for many years!
From memory the company that last made them is still going, but just not making them for sale any longer. They were based in New South Wales somewhere and find memory called Macquarie Engineering or something similar. Mick and Robbie, I think, possibly father and daughter were running the place.