Sterling Silver & Enamel BMW Keyring By Douglas Pell Silverware. It is beautifully designed. It extremely well made and designed. It is hallmarked with the makers mark "DP", the London assay mark, 925 and the date letter "d". It weighs 12.1 grams and measures approx. 10.7 cm in length. It is in excellent condition and comes in its jewellery box as shown.