CERN Mystery Object identified

I correctly identified a CERN Mystery Object ( https://cds.cern.ch/record/1764794 ) as a Multi-Wire Proportional Chamber, see Fig. 2 http://lhcb-muon-mwpc-cern.web.cern.ch/lhcb-muon-mwpc-cern/ . I worked on a similar device almost 20 years ago, my design can now be found here: http://aliceinfo.cern.ch/TPC/ . For the curious, I now run a 3D-printing related start-up. Physicists can do (almost) anything!