This is a little box I made. No supports required.

You will need a 1mm diameter rod, with 65.5mm in length. I used a paper clip, unfolded.

Use CA glue to join the parts and secure the rod in place ( don't glue the hinge :) )

Apply glue to the part in contact with the spine, to ensure the stiffness of the box.

If the lid doesn't fit SLIGHTLY sand the lock sideways with a fine sandpaper or nail file.

I think it would be better if printed with ABS.

Update 1/31/2021

I added 2 new versions of the covers, with some details. Not printed, yet.