Birkin bags are known for being challenging to get, always ‘sold out’ in stores, being offered even a simple leather Birkin is never d. This rare tin grey Etain Togo leather Birkin 25cm is a forever staple in your collection. Super Rare Introduced in the 2011 Autumn Winter collection, “Etain” refers to "tin" in French. This matte grey is effortless day or night.