$550.00 buys a lot of holster Rene. My advice is to see a reputable dealer and leave the guesswork out of the equation.
Tom over @ Legacy Collectables has many original holsters at approximately 1/2 that price and he stands behind his inventory's authenticity.
https://www.legacy-collectibles.com/...tible-holsters
And NO I don't work there or get a cut.