Is the emblem on top of the chamber or on the center section of the toggle? A Luger with a date and an emblem on the chamber would be quite unusual. The full serial number will be found on the front of the frame and the bottom of the barrel. The three "engravings" on the right side are on the receiver, and are inspectors marks and the eagle firing proof. It sounds like you have a 1908 pattern military Luger dated 1911. Does it have a stock lug at the bottom rear part of the grip? Photos will help a lot. Condition goes a long way in determining value.
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If it's made after 1918...it's a reproduction
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