Both of these can be measured by you as easily as they can be measured by another person.
For #1: Take an H320, syncronize it with your watch (or better yet, a PC that's synced over the internet), in a certain amount of time (the period over which you wish to know the drift) compare the drift.
For #2: Start a file at say 1:00, record for 5 minutes, and stop. Check the time on the file. If it's nearer 1:00 or 1:05 you know your answer.