Experimental Jet Train TGS ("Turbine à Gaz Spéciale"), power-car TAD-102.
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On that day, TGS was to run a charter service to Epernay, with Raymond Barre PM on board...
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Paris-Est.
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4th March 1979. 
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Photo by Bernard Vieu (Acknowledgements)
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# bernard.vieu@wanadoo.fr
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Posting and comment by P.L.Guillemin (plguillemin@yahoo.fr)