Vintage 2004 Doctor Dr Who K-9 Die-Cast Metal Keyring In Plastic Case - Brand New Case Fresh Shop Stock Room Find. Released by Marks & Spencer in 2004 as part of a series of Doctor Who Die-Cast Metal Keyrings. This fantastic mini K-9 Keyring is highly detailed and made of Die-Cast metal with plastic parts and measures 6cm tall by 8cm long by 2cm's wide and features the worlds most famous robot dog as seen in the classic Dr Who episodes, and comes in its own plastic display case. Brand New Shop Stock Room Find. Discovered in the stock room of a closing down shop with a whole host of other Doctor Who Keyrings from the same era. All orders received before 4.00pm Monday to Fridays are shipped the same day.