The little boxes would hold 9 tubes of engines and that's the way I always got them. Supposedly, that was the maximum number of engines that could be mailed in one box.

They never came rolled in newspaper. They were always in the mailing tubes. You could buy single motors so maybe if you were only ording 1 or 2 of a specific type they would wrap them in paper. I always ordered them in quantities of 3 because they were cheaper if you bought 3.

Whenever I ordered motors, I would order enough to fill one of the boxes. I still have one of those boxes and the postage sticker is from September, 1969 and it cost $.85 to ship.