It's dead easy to tell the copies from the originals from the shape of the knops (for want of a better description). If viewed from the top they are circular, they are the copies. The originals have knops which are eye-shaped when viewed from above. I'd take a photo of mine (which Mum has owned since the mid-70s and are signed) but I've just boxed them up and put them into the garage since we're having some renovations done.