A unique discovery was made during the renovation in 2023: a time capsule in the form of a copper tube with contents. This was placed behind the memorial stone of the new factory in 1956 by Nico Boessenkool. This also tells us exactly what the machinery was at the time:
- 6 lathes
- 2 milling machines
- 2 revolver lathes
- 1 planer
- 7 various grinding machines
- 5 various drilling machines
- 1 eccentric press
- 2 electric welding machines
