Hello, newbie here!

Was on another forum posting about my luger and they advised I post with you guys for better, more accurate, and more in-depth responses. Your guy's site is amazing! I've already answered a few questions just from this sites archive. A few still remain, was hoping to get your thoughts on it. Thank you in advance!
Original post on calguns.net click the following title to see full post and responses.
Luger Pics: How to Identify, Restore, Date, Shoot.
Here's the posting for your review/discussion/enjoyment
Hi there peoples! I have a luger that I'd like to get all your thoughts on. I've been researching it for awhile and it's starting to make my head spin. Far as I've gathered I believe this is a pre 1912 Commercial DWM Luger. But still can't figure out a few mysteries about it. So I wanted to post a bunch of pictures for enjoyment and possible discussion.
Is it possible to get a more accurate date? Believe 1906
What does the Eagle mean for the gun on the top? American/England import?
What does the 17228 stand for on the barrel? 7.65 mm
What does the B with the circle around it on the barrel stand for? Brazilian mark I think
What does the "3" directly in front of the trigger stand for?????
What would I use and how would I safely clean/restore this piece of history? Will be doing as little as possible.
Is there a way to find out or test if this is safe to shoot without harming myself or the gun? Will not be shooting this.
I would love to have this cleaned up and restored as much as possible so I can display it in my office and maybe one day give it to my kids. Here are some pics and a link to the full blown pics for review. Will probably only wipe it down with oil and put it away.
Full Sized Zoomable Luger Pics