Hello, Sorry but there aren't enough photos (from different angles) to properly authenticate. All the pics are essentially the same. I'd need a photo of the soles, the serial numbers, the sides of the shoes, the back of the heels and a close-up of the buckle/bow.
But from what I can see, there are a few worrying things. Firstly, the buckles are upside down - the 'F' of Ferragamo is normally closest to the foot opening. However, I have seen some genuine Ferragamos with this mistake, so occasionally a pair do slip through quality control without this being picked up. Secondly, it's unusual for this style of shoe (it's Lillaz, similar to Vara only the heel is different), and especially this vintage, to have a grosgrain ribbon that doesn't exactly match the colour of the shoes. This bow is a noticeably darker shade. But...whilst this is unusual, it's not definitive. So I just can't say either way without seeing more photos - sorry! Did you buy them?