Atlas Master HO 20007283 Gunderson 7550 Double Plug-Door Boxcar Union Pacific BKTY #160087Please note picture is representative of the item but may not be same road number. Always refer to product description for actual product details. Atlas Master HO 20007283 Gunderson 7550 Double Plug Door Boxcar Union Pacific BKTY #160087 In 2012, BNSF acquired close to 600 Gunderson 7538 High Capacity box cars. Four years later, TTX Corporation placed orders for a similar 7550 box car. At this time, they have over 4,000 cars in their fleet with more