John,
I believe IVST (JUST) means just in the sense of
fair, so the
legend means "justly venerated memory". It is
Aequitas, but I'm not sure what she's holding in her left hand - it looks like a
sceptre, perhaps.
Edit: Yep - the description says it's a
sceptre, and she's also winged on this coin, which is what was confusing me!
That was a great find for $5!
Ben