Guaranteed Authentic MANSUR GAVRIEL Mini Sun Bag in black veg-tanned leather.  This is the early style of this bag (first run production) so instead of a matte colored interior, it is the canvas lined interior with a middle zip pocket (as it is for the more expensive calf-leather version of these bags).  No longer sold in this style .  Purchased directly from Mansur Gavriel and thus comes with detachable shoulder strap, dustbag, box, all tags and receipt.  Currently retails for $700+tax.  
Description from website:

9” H X 11.25” W X 5” D
Italian vegetable tanned leather black mini sun bag with canvas lined interior. Single compartment with zipper. Detachable adjustable shoulder strap. Made in Italy.
Excellent condition with no stains, holes, or tears. There is some creasing at the handles and a really faint mark in the front (I tried to take as many pictures of it as possible).  Selling it because I hardly ever use it due to the fact I have another structure black bag I love better.  Comes from a smoke-free home.  I guarantee this item's authenticity.  I'm a proud member of the Purse Forum and recommend getting all your bags authenticated by the lovely ladies there.  Returns only allowed when item is grossly different from as described.  Thanks for looking!