Gucci vintage purse

Classic vintage Gucci purse. Has some discolouration around edges but not overly noticeable. My neighbour gave me two Gucci purses that belonged to her mother. She thinks they’re authentic but I’m not an expert. I’m not trying to pull a fast one on anyone, but not sure how I can guarantee their authenticity. Here’s what I found on the internet: Vintage Gucci bags from before the 1960s had model numbers on their tags. Around the 1960s some bags would and others would not have a model number. Around the 1970s Gucci bags had no serial or model number and just the Gucci script in cursive.