It's a copper pan with tin lining, cast iron handle. Nickel is used in a couple of pans, but it's pretty rare. It's not stainless. I'd guess it's about an 8" fry pan based on the ratio of the handle to the pan size. I don't think it's a crepe pan, they have a larger flat surface and smaller lips.
As far as manufacturers go, in one sense it really doesn't matter. Very few companies even make the pots. Mauviel makes most of the copper pots for people, even if their name isn't on it. As far as the handle goes, there are a few common options. A cast iron handle is very traditional, so is bronze. Stainless is also available.
It's not a Mauviel pan if it's not stamped as such. It could be Borgeat, World Cuisine/Debuyer, it doesn't actually matter for how it will work.