1st Luger. I would like help on ID and value

[Doubs]

Welcome to the forum. Once we see sharp, detailed pictures, we'll be able to tell you a lot more.

1917 was the year it was made. While commonly called "double date", the 1920 is a Weimar Republic property stamp and not an actual date. All arms owned by the government were to be stamped with 1920 to show government ownership and prevent theft of government arms.