Inherited 14k Pocketwatch

I inherited a watch from my father which I believe belonged to his
grandfather, after some looking I figured put how to open it and found the
serial numbers on the case and movement and am hoping someone can tell me
about this watch. It's movement serial number is either 888457 or 838457, I
had some trouble distinguishing the second digit. And the case serial number
866085.

Thanks!

Here is info from the DateYour IWC website for your pocket watch. It has to
be this one as yours is a lepine pw.

The other movement number is for a savonette which is not what you
have.

Beautiful watch