I have a 20 something year old Stronglight headset that came to me in pieces in a rag.
I can assume the correct way it would go together but want to make sure. Here's the pictures. There are 4 conical metal parts that would seem to have the bearings fit in between them. There are 2 smaller ones and 2 that are larger.
I placed them in the order I think with the top nut on the bottom right going to the left, then start back up at the top right going left to the end.