This is the jagdpanther at the Imperial War Musuem (London)
You can see that the front road wheel has been replaced to the late model wheel. I seem to remember that this was common practice as this wheel used to wear out faster then the rest.
Here's a close up of the front wheel
These picture are off the [link=http://www.panzerworld.net/]panzerworld.net[/link] website.