One new original Bosch brand generator brush set (made in Germany), part number 1.107.014.129 or WSK40sort7. This fits:
BMW 503 & 507 (generator # 0.101.302.033)
BMW 3200CS 1962 - 1965 (generator # 0.101.302.003)
Mercedes Benz 220SEb 1959 - 1960