While I was scanning photos from Michael, I scanned this one of two models on a lake on Tues.13.6.06. Perhaps the camera was on a wrong setting, and is was Sat.10-Mon.12.6.06, at the annual major steam rally in Echuca? The rally is not at the port, it is at a greenfields site on the fringe of the city, with Campaspe River alongside (but not navigable to that point). It features steam and other machinery, and has a miniature railway track on site. Last time I was there I photographed a massed display of Victa lawnmowers: a classic Australian design ('Victa mowed Australia what it is today').
The further model is clearly of PS Pevensey.
The nearer one is more mysterious: the doors on the upper cabins do not match either PS Pevensey or PS Alexander Arbuthnot. As explained by three independent posts below, it is PS Ulonga, a close twin to PS Pevensey (see the thread on Aussie twins somewhere else in Paddleducks).
I haven't compared this photo with the ones taken at Echuca's 2006 heritage festival to see if they are the same models.
Regards,
Roderick B Smith
Rail News Victoria Editor