Tell me what i have

a have a luger pistol that has a four leaf clover on the left side of the grip with a swastica in the middle of the clover. On the other side it has the initials EWB engraved into the wooden handle. Also under the safety on the left side it says "GESICHERT". I know nothing about guns, and was just wanting to find out some history and what the value may be. It is in excellent condition. Any help would be appreciated.