I’m having a hard time finding anything about the NASCO company. If you know please send a comment and I’ll post it.
In the meantime, here’s how this set ended up in the family.

It was most likely the 1940s and Bendikte Olsen and her daughter Helen went to a neighborhood social in Brooklyn, New York.

Bendikte was known to arrive late to any and every event! This night was no exception.
Despite being the last to arrive they won the door prize!
It was a complete set of NASCO china like the pictures posted here and here.

Apparently, the early birds at the function were not pleased the latecomers got the worm.