Vintage American Thread Co. Silkine Crochet Cotton, 10 New Skeins in Original Box

This cotton is new old stock from an old department store here in Maine.  The color on the box says white No. 70 but it looks more ecru to me.  There were 12 balls in the box but I’m assuming 2 were sold as there are 10 now.  It doesn’t appear that any were used but some have been unraveled and rewound.  The original box is in good vintage condition.