Different theories circulate about the exact number of this vehicle (9704, 9714 or another). They are all plausible, but were never proved. The number 9714 was chosen based on rumours and visual testimonies (from old employees), while other sources (including official ones) claim that 9704 is correct. The truth will never be retrieved.

Photo: Herbert Heller (Belgium) negative and photo from my collection and written permission to use the collection in my possession.