How Can I Tell If This Nazi Dagger Is Authentic?

Before My great Uncle Died he Gave Me This Nazi Dagger. I found out that it is a Nazi Dress Dagger but i dont know if it is authentic. Is there any way i can tell? He are some pics, tell me what you think: Dagger In Scabbard http://i38.photobucket.com/albums/e112/SaintNoOne/IMG00091.jpg?t=1271147610 Close Up Of Handle http://i38.photobucket.com/albums/e112/SaintNoOne/IMG00092.jpg?t=1271147740 Dagger Out Of Scabbard http://i38.photobucket.com/albums/e112/SaintNoOne/IMG00093.jpg?t=1271147785 Close Up Of Crest In the Blade (Its too blury to read but it says "F.W. Holler" thrn across the bottom "Berlin" http://i38.photobucket.com/albums/e112/SaintNoOne/IMG00095.jpg?t=1271147810

I hate to tell you this, but it's probably a fake. The giveaway is the manufacturer's stamp. F. W. Holler only made ceremonial daggers at Solingen, not Berlin.