Please watch: "How to open a watch case back, the most important video a watch collector will watch"
https://www.youtube.com/watch?v=Usn4sEHTXNU‌ ‌‌ ‌
WARNING CLEAN UNDER YOUR OWN RISK.
In this video i show you my way of cleaning vintage watch dial, if you expect a new dial this is not the method for you, you need to get a new dial or refinish the one you have.
This is a simple way to do it but if not careful you can ruin the dial.