Postwar American Flyer HO Gauge 501 Burlington CB&Q hopper with load and 521 Northern Pacific NP reefer, freight trains in original boxes, C7-8 with run time. 501 box is missing end flap, good cardstock insert, fairly square and solid. 521 box has light lettering/ink stamp, no torn or missing flaps, solid cellophane window, excellent cardstock insert, quite square and solid.