Potonie, Paris clock

[Bearman]

Evening,

On wet and wild Saturday last week I found this lurking in a dark corner of the hospice charity shop. It's definitely french, name on the face is a bit of a give away, which made me look a little closer. Then I thought I was in luck as the bell tinkled away as I picked it up, it was loose inside, on opening the front it had the pendulum (detached) and even a key that fitted. I couldn't leave it behind.

By the time I got it home the poor thing was going like the clappers so I think it'll work again with a bit of TLC.

 

After I got it home and much better look at it I pretty sure this is a marriage. The movement I've seen similar on much more elaborate clocks. All gold with figures and sculptures. Though I do like the case as it's solid wood.

 

Now comes to the questions, am I right in guessing the movement is late 19th century with possibly early 20th century, or later case? Not sure on the name of the style.

Was Potonie a clock maker or known as a Paris jeweler? I've seen similar movements with different markings. Would I be right in saying '465' is the model number as its on both the movement and pendulum, and '13029' the serial number perhaps?

As you can see it's been the victim of rough handling as couple of things are bent up and if you look closely you can see what's left of the suspension spring. 

Would anyone know length/dimensions of the suspension spring?

Thanks in advance for any insights.