Julia's Auctions had this flag some time back and they are not known for selling fake flags. At least not deliberately.
Exceedingly few flank markers exist today and this MAY be one of them. This does not have the frayed edges of the stars like ALL of the fake flags on Ebay have. They are turned under.
Also, at most of the CW shows I have been to the flags are real, not fakes.
Greg Biggs