Ultimately, all these nibs consist of solid gold; the difference lies in a platinum coating or platinum intarsia, which has been applied since the 90s mainly for visual reasons, e.g. so that the nib matches the look of modern models like the StarWalker. The coating has no influence on the writing behaviour. Besides, on some vintage Meisterstücks (e.g. the ranges 132 to 139) there were steel nibs used due to wartime gold shortage; they write well but are regarded as inferior compared to the classical gold nib.