Ah, another "télécommunicant"!

I briefly worked on 11F centers back in the 70s and 80s, not E10 family, but in 1999, I salvaged some AM2901 chips from Mitra CPU boards that were headed for the scrap heap. They came from either the Yellow Pages or Transpac in Rennes facilities—it was a hectic time!

As for information sources, I found doctoral theses from CEA, a scientist from INRIA kindly pointed to INRIA historical resources and current work [0]. There are as well SNCF, EDF or BULL historical resources, a museum in Denmark, ex USSR documents but for creating a Mitra simulator nothing beats Pascal Chour's website.

What is missing for a SIMH simulator is original software to make sure the simulator is accurate (currently it is not).

[0] https://tiers-lieux.univ-rennes.fr/projets/mitra-miniature