u/Pigoms

My wife and I own a set of all clad pots and pans and she picked this up at a thrift store today for a few bucks. Does anyone know more about this pan? We can't find another like it posted anywhere online. As far as we can tell it is likely from the 70s. If I wanted to refurbish it does anyone have a link to a guide on how I would do so?

Thanks in advance for any replies!