Recently saw one of these in an antiques dealer's shop ... he wanted $50 for it.
http://i.imgur.com/2bowum.jpgApparently GM is still making remedies for their leaky radiators.
Thanks for commenting. You might enjoy my book about Flint called "Teardown: Memoir of a Vanishing City," a Michigan Notable Book for 2014 and a finalist for the 33rd Annual Northern California Book Award for Creative NonFiction. Filmmaker Michael Moore described Teardown as "a brilliant chronicle of the Mad Maxization of a once-great American city." More information about Teardown is available at www.teardownbook.com.