And i think that the chevron (3,6,9) markers clearly identify it as a 50s piece. In terms of what to do, it depends on what your plans for it are. If, as I hope, you plan to wear it and keep it in the family then restore it to whatever level you like, and not necessarily through/by PP. if you have an eye on sale (now or in future) then generally better for any work to be done by PP - but others are correct to say that too much work (e.g. Zealous case polishing) will hurt value. Btw all this also depends on whether movement needs lots of work as well as dial. All this will cost a lot - won't comment here on value but if you web search the reference you'll get a good enough idea. If possible get multiple opinions - PP Greece ok, but the more the merrier as it will be a significant investment of time and money whatever you do.