Burberry Blue Label canvas shoulder bag

Authenticate Blue Label that was sold in Japan. Measurements: 14"L x 5"W x 7"H. Was an everyday bag, and I've included pictures of all the stains and pen marks inside the bag. Since it's white canvas it's foxed (see the brown stains), but I'm too scared to damage it by cleaning. It only comes with the straps seen in the pictures. If someone is skilled enough to take out the stains, it would be near perfect as the leather and metal parts are in great condition.