As I learn more about my Luger, it brings other questions up. Below are some pics with the questions below.

Just left of the 717 is an unknown symbol. It looks like 88 or a clover. Sorry these are the best pics I can get.

Last two of the serial number under the toggle link, but when I flip it over I see an 8 on the other part.
I've looked under the technical tab on the left side of the forum and didn't see that "88" symbol.