Brown Shiny Pumps - Vintage Ferragamo?

Please note: I picked these pumps and one other pair up second hand and I'm having a hard time figuring out if they are authentic Salvatore Ferragamo's. If you have any insight- please leave a comment! Some chipping on the heels and other wear (see photos).these are size 8.5 B. The color is like a metallic chocolate brown.