John,
If you do a search right here using the word Charlin, you will discover a lot more than I care to type. But, I'll give you a few highlights.
A Charlin is a distinct sliding breech gun that is different and unrelated to a Darne, until 1965, anyway. In 1965, the Darne company purchased the Charlin company, and produced the guns alongside Darnes, until stock was exhausted.
The Peugeot would have been produced using 1894 Darne R patent proofed and barreled actions, that were sold out the back door of the Darne company, after the introduction of the new model 1909 Darne, that is the action we are all familiar with today. This is commonly known as a clone. There were many. As a fast rule of thumb, they tend to be well finished, even the guns without a name on them, and they sell for less than a typical Darne.

As I said, a search right here will produce lots of reading and knowledge.

Best,
Ted