You can be pretty sure that if it has 'econo' in its name it is...economical (or, to quote my Mom, cheap).
And economical is not a bad thing.
They are awesome dishes, whether they were economical or not. They saw lots of Sunday dinners, birthdays, and Christmas feasts.
And they have cracks and nicks and dents. Many. Each one with a different story.
I was surprised to read a few years ago that china is actually stronger than earthenware, inch for inch. That is why china can be made so thin. Koodos to china! Never judge a book by what others are saying about it!
I was also surprised to find out that bone china actually has bones in it. It was many years ago when I learned that, I was young and I was traumatized...for a nanosecond.
The dishes contain ground bone.
Bone, like what is part of the food on the plate.
Those old timers were pretty darn clever to figure out that adding ground bone would make the dishes stronger and whiter.
But, in the meantime, if you are a vegetarian you may want to avoid eating your meals on bone china!