I recognise that trailer as a model in the Palimino range imported from the USA about 5-10 years ago by a company on the NSW Central Coast. Similar in concept to a Jayco wind up.
Heap of junk.
It's funny after reading the Patriot gas recall thread, this Palimino trailer caused all sorts of greed for the company when they where released at a Sydney camping show, the gas never would comply, the electrical and towing chassis components also where pulled up via the different regulators.
Not sure where the company ended up but obviously someone bought one.