By the late 1960's, these tanks cars were among the oldest freight cars on the Frisco roster. There were built during 1909-1910 by ACF. During trip to Paola to pick-up my Dad, I spotted one on the Back Track. It was nearly dark and back lit by the setting sun, so the results were poor. The car was painted black with white lettering. I spotted a second car from this class along the Clinton Sub at De Mund. It was painted gray with black lettering. It was soon to be cut-up.