A great source for real vs. counterfeit is "Anabolics" by William Llewellyn. I have 3 of his books and treat them like anabolic bibles. He breaks down every steroid, anti-estrogen, weight loss drug, etc. all the way from doses and side effects down to their chemistry. The last section of the books have actual pictures of real and counterfeit products. British Dispensary is one of the ones covered. The pills are stop signs, pink or yellow depending on mg, a snake on the pill (company's logo), line through half of the pill on one side, an imprint on the lid of the bottle, a hologram, and there's always a place where the stickers should be on the bottle. That's all I can remember without getting a book and looking it up for you.