In the meantime, I was able to produce the missing clamps.

What is still missing is the clamp holding the lid.
For this I have a 15 X 15 mm brass rod stretched on the milling table.

After the 2 D construction for 3 sides I was able to work the staff from 3 sides.

After that, I sawed off 8 mm slices of the rod and reworked, now the clamp is already visible.
So remained of 121.6 gr. Brass, 8 pieces clamping bracket, each with 0.2 gr.

First of all, an M 0.6 thread was cut into the clamping yoke for the clamping screw. Once everything had been assembled for trial, the function of opening the axle box could be checked again.
After cleaning and blackening the axle bearing, ball bearings are used.