f17r

[Paris]

If french, the two first words could be :
"mallier aller"

"aller" means in english to go to.
Logically, we can expect to find the destination after to go to.

The third word is "luz" or "lucz". Let's imagine it's "lug".
The bar over the "g" indicates an abbreviation.

In France, there are small villages with name beginning with "Lug" but we can be sure that Post office didn't exist in these villages in the sixteenth century.
So, only big cities are concerned by Post office.
But in France, we don't have a single city with a name beginning with "Lug".
So, I tried a different point of view.
What if we choose the latin name instead of french name ?
The two main cities in France during the sixteent century (and now also) were Paris and Lyon.
The latin name for Paris is Lutetia. I reject this possibility because it begins with "Lut" and not "Lug".
The latin name for Lyon is Lugdunum. I prefer this possibility.

I insert above two images of a silver and gold coin.
They are antique coins (probably fifth or sixth century).
They have been made in Lugdunum (Lyon), that's why we can see the abbreviation of this city (Lug)


It's just a possibility ; I form a hypothesis.