I was able to find a nice picture taken from a plane of the Royal Enfield Works from a 1930's French Catalogue. Comparing to a modern aerial photograph from Windows Live search I could identify three buildings as still standing,
How can one be so sure? Windows Live search allows to rotate the image, and one can see that those three buildings look much older than the other surrounding ones.
Notice the railroad at the bottom right. So if you allow me some poetic license one gets: