Gray Arithmetic Workbooks 1950s

So back in the early 2000s there were these gray reprinted arithmetic books that covered grades 1 through 8, with one workbook for each grade. The early grades had a multiplication table on the last page. The 8th grade one had volumes and business math. I remember the 7th grade one was originally published right before Alaska and Hawaii became states, because they used the size of some states for explaining bar graphs, but only had 48, and I looked it up back then. So that one would have to be around 1958.

The illustrations had Dick and Jane style dresses. All black and white. The whole book was done in just black and white with the gray covers.

They had black bands and black numbers on them, but no other markings. Saddle stapled, I think. They may have come off an Amish or Mennonite press, but I've not been able to find them.

They were really thorough and used a spiral learning system, which is why I'm looking for them.