I see a lot of potential in this nomination. The CTG is the biggest syndicate in Argentina, a country that loves (and is probably partially ruined by) syndicates. This topic is not represented on the list, so it would fill a gap. The building itself was inaugurated 1950 by Juan Perón and was built in Rationalism style. It survived the military dictatorship and is still in use. Unfortunately, it is currently not open to public, but this could change in case of a successful inscription.
I passed the building on a walk through the city centre. It’s just a few blocks from the Casa Rosada (the Argentinian White House) and close to the interesting Mercado San Telmo, the fancy Perto Madero and Siga La Vaca, the one restaurant that every Uber driver recommended to us. It was a short visit of course, as it is only one inaccessible building. At least you can take a picture of the entry area with the stairs through the partial glass door.
If this gets inscribed and opens to public I will definitely be back. I also got inspired to visit the worker’s museum in Copenhagen.