I have a 230sl which I am trying to source chrome Bosch wiper blades for. Are there other differences between post 1967 wiper blades and earlier cars other than the early blades are chrome? Should a 230sl wiper blade be stamped with the Bosch logo or should it say Bosch on it? Does the same apply for a 250 or 280sl? Is the form of the blade different? I thought I remember reading the later car's wiper blades are bulkier looking. I have the ability to acquire stainless wiper blades and could have them chrome plated. I have searched the forum and have read comments but can't find a definitive answer.