Horseshoe stamp : The horseshoe stamp was issued in 2009. This Gao is from 2001.
Leather : the pictures are not HR enough to determine the actual leather the bag is made of. Seller says Clemence but it could be another leather .
Hardware: It is gold. Some people (even someone working at Hermes) can say they never saw it, it does not mean the bag is not authentic, It only means they never saw it.
Authenticity :My opinion is that this bag is authentic. Can't tell the leather though. Color could be Brique.
Thank you Perlerare, I appreciate the clarification that horseshoe stamps only began to be placed on special orders in 2009. However, it was not just Reiko's opinion, she phoned Mercedes (who is "the West Coast Claude" - ie, master crafter), and also did a search of the Hermes database for GHW special orders for me - none were found, but her database may be limited to the US special orders? I'll have to ask. I was also told I could not special order a Gao with GHW at this time (this was may 2010, so very recently, not 2001).
I agree the bag looks authentic - but not Clemence cuir, altho again, I agree the photo is too low res to tell - but this is why I am so puzzled. The previous ebay listing, a black fjord GHW, also looked authentic, which is why I began asking the question in the first place.
I agree the colour is probably brique.
Thank you for taking time to respond. Has anyone ever personally ordered or seen a known-to-be genuine GHW Gao?