Engineer's Sign Reproduction Kit

[Alain147]

Hello to everyone from France!!
A few day ago, I drove to Belgium to pick a massive chest I haven't seen anywhere before.





Unfortunately, there is no inventory sheet stuck inside of the lid (as it usually lists the content).
Does anybody have information about this chest? its content? any pictures?
I would greatly appreciate any help.
Regards
Alain

[PDP2020]

What a great treasure. Sorry about the delayed reply...

It would have been even greater with content, but still, think of all the history.