Father's Eyewear Case

This model I've designed because my belated father had a eyewear case with a special way to close and flatten like this.
I was curious if it was possible to find that special way and fold it from one piece of paper without using glue.
Takes some time but it worked.
There are great reverent points to fold it. With an A4 or letter size paper you can use it for your own glasses.
But it's also attractive to see what happens when you flatten it.