Can you post pictures that are in focus, and give the sizes?

The case is 7 1/2" long, 2 1/2" across and 1/2" deep. Should give you an idea of the size of the pieces. Something is wrong with my camera. I'll try to get better pics but not sure if I can.

I can't see if they are brushes of knives? Nor if they are capped...
In the pictures' blurry state they look like a set of maybe 1970ish X-acto knives.

From bottom to top. The first has a slight scoop on the other side. The second has an eraser on one end and a metal tip on the other, not a mechanical pencil. The third is an x-acto knife, and the fourth is flat on the black end and metal on the other. The closest guess I've gotten is sculpting tools, but not sure about that.

For some reason i have a niggling in the back of my head that says printmaking or early graphic design layout tools

pottery tools?

I was thinking of the kind that is fired, then a design is drawn and painted on and fired again.

Still no erasers used...i'm a potter.

Embossing tools?

I think it's tools for sculpting clay...or for decorating pots....and what you are calling an eraser...perhaps a smudger....for softening lines made by the pointy other end?

I think those may be tools for modeling in clay or wax. Tools similar to these are used to model auto bodies and new product concepts. These are also used for sculpting.