Tony: I am Phillips Petroleum Co. retiree and conocoPhillips and now Phillips 66 Company after a merger and divorce own the rights to the 76 brand. I will try to slip by the museum tomorrow and see if I can learn anything more on the topic.
Thanks very much. I appreciate any help. I too have heard the World's Fair story but the _Railway Age_ coverage of the event, though it showed a number of pieces of freight equipment, did not show this car. It of course may simply have been omitted.