Odd that 4 wheel cars and tender would be labeled as O-gauge, not 027, but by 1942 Lionel was wrapping-up production and switching to war production. Also the set is uncataloged, does say 027 on the set box. Looks like clearing-out inventory was more important than making sure that labels agreed. A great little set, and great piece of Lionel Prewar history. So unusual and rare, but as Terry said, they made enough to justify printed set-box labels.