1900 American Eagle

I have recently recieved a what I believe is a 1900 American Eagle. Its serial number is 13906 and has an American Eagle on the top. The only thing that confuses me is above the eagle there is a Star of David I believe. Does that sound right? Any way the luger is in gret condition. My grandpa said he took it from a german officer in WWII after he killed him. It is fireable and shoots very well. Any idea on the value. I have had couple local retailers say between 4 an 7 thousand depending on who is collecting it. Any help would be much appreciated.