When we have quantity of an item in stock, we use stock images. The item you receive will have the exact same authentication company, signature color, similar signature placement, etc.
It is simply too time consuming to shoot each one individually. If we have only one of an item, we will shoot the exact item and notate it in the listing. It may say the item in image is the exact one you receive, and/or will have the specific authentication number in the title.