Well done Jenkins, The first image is of Romorantin-Pruniers, the second is of the Romorantin-Gievres aerodromes.
To match the second, look at the rhombus of roads/rails made by the D976 north of Gievres and the rail that passes through the town.
The multitude of buildings were a balloon assembly plant - close-up of some of them.
Have you managed to sort out your technology?