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 Close Up Of Handle Dagger Out Of Scabbard Close Up Of Crest In the Blade (Its too blury to read but it says "F.W. Holler" thrn across the bottom "Berlin"

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.