This is a Luger that has been around.
Started life as an Imperial Erfurt.
Was rejected and repaired, (crown RC)
Had date ground off in 1920.
Somehow got a Swiss shield on the chamber.
Has a Swiss target long barrel.
And has those little sunbursts on the upper and lower as well.
Any ideas?
http://boards.rennlist.com/upload/1920swiss.jpg
http://boards.rennlist.com/upload/crest.jpg
http://boards.rennlist.com/upload/oddmark.jpg