Newbie- unknown Luger

Greetings to All,

I am a newbie to Lugers, and I would like to

buy a shooter/collector. I found one I like

but don't know what I'm buying. Can anyone

offer any ideas as to what I have?

This Luger has a large five pointed star

on the frame over the chamber. The star is

the size of a quarter. There are some proof

marks and a date of 1919. It is chambered in

30 cal. and in nice shape to my inexperienced

eye. I think it is re-worked. Any thoughts

are appricated.

Bill