I just bought a Watson W-881 through Amazon. I thought I'd check it when it arrived as i had read that there are fake versions of this antenna. Upon inspecting the antenna I noticed a couple of discrepancies. The first is that it is advertised as being 41cm in length whereas mine is only 40cm. Also I have been looking at images of the antenna on the net and the writing on the label at the base of the antenna runs vertically up the antenna whereas mine runs around the circumference. The little yellow plasic wallet that it comes in looks genuine, but who knows. I might just be being paranoid.