383 machined crank weights?

I will try to get out there tomorrow and get the pan off and snap some pics. I guess I have never seen one like this.. the sides look like normal, machined.. but slightly golden brownish colored. The bottom surface of the counter weights look so freashly machined and shiny you would think I did them yesterday.

The motor was in excelent condition and I believe had just had a complete over haul. So time will tell when I get that pan off and inspect it further.

Thanks