Here is one of my first hammered cast iron skillets. It is cast in a very fine smooth sand and is polished on the inside and it is well made. It measures 6 1/2" across the top and the bottom cooking surface is 5" and the exterior flat surface is 5 1/2" The only marks I can see are two small indented holes on the underside of the handle. I have attached a few pictures. Any idea who made this and when?