July 19, 1968 production date, just in time to be for the 1969 change over and builds. Look closely at the numbers, there are no raised edges, so, they weren't stamped in place, they were "rolled". Some bodies will show what looks like a rectangle area around the numbers, the rectangle is the face of the platen that holds the numbrs. Some bodies are better done than the one shown above, they don't have the horizontal lines this one does.
That is one expensive distributor core, be happy, put it on the shelf, DO NOT MODIFY IT. It went into one of the first DZ engines.
When I refurb a distributor during a conversion, I completely redo the body by Chem-Tool cleaning, then glass bead blasting. The glass bead actually opens up craters on the aluminum, which capture and store dirt, oils, greases, and are hard to keep clean. Just after bead blasting, I use a hand held Brillo pad over the bead blasted areas under fairly hot water, it doesn't take much. This closes down the "pores" created by the blasting, and makes the surface as close to stock looking as I have ever seen. This also helps oils, dirt and other contamination come off the metal fairly easily.
Below are the same distributor, as delivered, and when the conversion was done. This one looks like this today, I converted it 32 years ago. This one has had the numbers area machined to remove them, but the rest of the body is done by the processes listed above, posed simply to show how it comes out with the cleaning done.