Vintage 2004 Doctor Dr Who Cyberman 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 Cyberman Keyring is made of Die-Cast metal with plastic parts and measures 6cm tall by 4cm's wide and features one of the Doctors deadliest enemies, The Cybermen as seen in the Dr Who TV 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.