What is my Luger (and what's it worth?)

[lugermom]

Hi everyone, I inherited several Lugers from my Dad and I'm trying to figure out what I've got here. I think this one is a 1914, and I took photos and made notes of everything I could figure out. For the rest of the information you'll need, I don't even know what I don't know yet, so please be patient with me. I can take more photos if needed.
This gun was in Canada until recently. I assume the "Germany" mark was put there when it came into Canada from Germany. It should also have a mark indicating that it came into the USA from Canada, but I haven't found that yet.

I'll post photos from my phone--give me a few minutes.
Thanks in advance for your expertise!