Gucci sunglasses real vs fake. How to spot counterfeit Gucci eyewear 

I bought some sunglasses that have a serial number ending in "SA" idk if this tells they are fake or not. Does anyone know?

Not true Inhave authentic Gucci glasses purchased from Macy’s and I paid extra for the solarized tint and they do not have serial numbers or name around the rim…I do have serial numbers on the inside a lower to my ear

put the serial number in enay