1917 luger

New here and just purchased a 1917 DWM that - based on my reading of other posts in this page - is a military "T S S" model. I believe the "T" is an underlined T. I have not disassembled the pistol yet, except to take the wooden grips off. I expected the grips to be marked 2191 like the...

I'm trying to better identify what I have. I understand this to be an artillery luger with matching serial numbers 6882 (and then 82 stamped on all other pieces). It is a 1917. Please see pictures and thank you very much in advance for your knowledge, expertise and help! If you can help...