This belongs to a friend, and as it is well outside my area of knowledge I am helping to post it here so that hopefully some questions can be answered by someone who knows Bovet and chinese market watches:
1. During what timeframe was this movement produced?
2. Does the dial look original?
The watch is key wind/key set. The case is silver but without any hallmarks known to me.
I know very little about such watches, but IMO, the movement has all the distinctive characteristics of the real thing, and the case looks right. The dial looks a bit cruder than I would expect of Bovet, but surely it is possibly that the watch may have had a custom dial fitted in China and I've no idea what the quality was like back then.