Authentic Alexander Wang Black Darcy lambskin studded hobo bag RRP NZ$1550

Hi! I purchased the bag in London in about 2010 when I lived there at one of the Department stores. I've since married and can't access gmail account with my maiden name to see if I have electronic proof of purchase. Can't think of another way to prove authenticity sorry - I definitely have long lost any card etc. It doesn't have any scuffs or marks - exactly as pictured - the texture of the lamb leather means it is difficult to scuff.