Vintage ? 1970s high school drafting tools set drawing architecture metal pencil

Description

What you see in the photos is what you get. I don't know anything about drafting sets. The woman I bought it from at a yard sale said that she used it in high school. Based on her age, I'm guessing it's from the early 1970s?
There is no brand name on the box or pieces that I can find. Label or sticker in bottom right corner of the box has been scratched off.
Plastic box. White plastic tray inside is a little grimy.
Plastic triangles and compass. One of the triangles is broken.
Metal tools.
I think there might be one piece missing? There is an empty space underneath the ruler. But maybe nothing went there?
Foam backing in the lid of the box needs to be re-glued.
Two sizes of lead for the green mechanical pencil.
Priority Mail - flat rate.