An April 25, 1950 letter to K-F dealers states that all 1951 Frazer cars are equipped with a K-F windshield washer. I don't believe that any other K-F product had windshield washers installed as factory equipment other than the Darrin. The letter stated further that the Kaiser would not have standard windshield washers but that they had been supplied with parts that would help in the installation of washers as an accessory item.