Finally got up the nerve to field strip my Luger. Wow! Worked on it for over 2 hours

Definitely not a 1911A1.
Anyhow here are the results:
Back of side plate stamped 87. The 7 is not as deeply stamped as the 8 but it is there.
Trigger assembly 04
Breech block 04
Firing Pin 04
Hold open lever 04
Toggle Pin 04
Also noticed on closer examination a small Eagle over 63 on top of barrel. Smaller then the E/63 Waffenamts on the right side of the receiver.
Same size as the Eagle over swastika on barrel.
I also found a very small N stamped into the frame under the left grip right below the main spring. Any idea what this means?
Some minor rust and light pitting in this area also.
Thanks,
Mike