The obverse legend, like other French coins, gives the kingâs title as Francorum Rex ( King of the Franks  in Latin) and provides another reason to call the coin a franc. Its value was set as one livre tournois (a money of account).
Favor has a no-tipping policy from company to restauraunt, so those waitstaff that take your order pay out the kitchen (they have to pay out a certain percentage of their total sales) for you to not tip. They pay the kitchen to make these orders and make no money, unless you tip out of pocket.
I recommend you tip on arrival and departure with the bulk of the tip being deployed on arrival in order to influence the quality of care your vehicle is about to receive. Tipping only at the end does nothing to influence care. I wrote a lot about this in: What to do when valet parking. Additional useful article: How much to tip valets. If too many guests stiff the valets, it can be embarrassing to the event host.