Awesome, that's what I was hoping to hear. It looks different then the ones I've seen online but it most likely is a later model
It's definitely a later model. The "Wilton" lettering is blockier/flatter and the pins for the nut are at least an inch (roughly) forward of the back of the casting. The older style had the pins less than 1/2" from the back of the casting. That puts it as 1998 or newer according to Wilton's diagrams.
I don't recall what year the move from Schiller Park was, but the newer vises say Made in USA rather than Schiller Park, so that's another clue.
Here's a newer 500 with the more blocky/flatter lettering and the pins forward with the larger dust cover.
Older 500 with the more raised letters, and pins near the back of the body.