Doubting if I did a good choise of a watch or not

Hi there!
I just bought this poket watch online and still need to pick it up personally, so still doubting if it is a goos deal. I saw a case 6 years ago on this page that was similar to mine, yet the finish was different. I would love to know your opinion, if you think that I can open it and fix it (because it doesn’t work now) and what you think.

I also put a picture I just found that shows that this type of watches have had a base expositor.

Thank you in advance