There are few sources, as well as a very questionable, extremely flawed list of company names, locations and people. The list refers to 113 companies involved in the construction of the factory or aircraft production. Unfortunately, only this erroneous list has been published, referenced and mentioned as the only source. We deeply regret that some regional, self-proclaimed “researchers” simply accept information and statements from this list and do not consider it worth the effort to question, verify or search archives of even one of these companies.
For this reason, we have spent more than 6 months researching this topic, correcting the erroneous list and now also coming to a much higher number of companies involved. Another positive aspect was the receipt of a plurality of new documents on this topic, which sheds new light on many things in the production process or the construction phase.