1921 Luger identification

[d39brown]

Hello all,
I'm very new to Lugers and had an opportunity to pick up my first 9mm the other day. After my excitement dissipated my curiosity improved. All the lower pieces and barrel are marked 219, the slide is 33.

Can you help me identify what my gun is?

Here are some pictures, please let me know if there is anything you can share...

Darrell