Update - How to tell a fake Hermes Birkin
Lambskin lining, clear-cut correct font engravement on metal plate, slim diamond-shaped end-handle stitching, soft leather, they are not the standard answer to an authentic Hermes birkin any more.
My sourse told me a so-called OMAS company claims to make the most authentic birkin bags apart from Hermes. They have been in the replica market for more than 4 years. The latest omas birkin bags sell more than $1,000 USD. They claim they are using the same togo leather used by Hermes.
My sourse also told me most of these bags (without logo plate) are shipped to Japan. The logo plates are then put on the bags in Japan. I start to wonder some authentic Hermes Birkin bags sold in the second hand shops which are prevalent in Japan might be fake!

