The bottom coin, which appears to be a Vespasian denarius, looks very suspicious. The softness of the devices (the raised detail) on the obverse and reverse don't appear to be from normal wear, but rather due to being a cast forgery. What is the weight and size of this coin?
The legionary denarius seems genuine to me but I have the same concerns that IOM just posted for the second example of ?Vespasian? This may be another job for @David Atherton
That's possible, though I disagree. I think it's most likely a genuine coin, but one that is very worn from circulation and harshly cleaned, possibly by soaking in acid.
