Vintage Miu Miu Large Quilted Leather Shoulder Bag

I purchased her from an estate sale so I have little history on her. She is vintage, came from a $1M home, she is large and in charge. She is a very dark brown and she's quilted leather. I'm sure she could be polished up like a diamond if polished with leather polish. She has quilted, braided handles. She unfortunately doesn't have the shoulder strap and one of the M's in "iu Miu" is missing. I tried to authenticate her but depending upon the age of her, from what I read, there isn't a true way to authenticate pre 1970. Please don't hold me to that, it's just some information I found on Google. There is no authentication tag. Size: 14" Long x 12" talk x 6" deep