Charm exp table?

The only medals I've gotten that give Charm were the two from the most recent Archaeologist event, the previous event ones didn't give anything.

Yes, equipment acquired before the patch gives you charm as well. So its easy to get Charm on the first couple of days

Here's a picture of the line I mentioned before, basically saying this item gives 50 Charm one time.

 Spoiler

And Zakum's Tree Branch does not give any Charm.