***
Agreed - St Mandé or Grenelle (and it is not easy to decide which factory, given that the key worker at St Mandé - Thomas Bredgen - went on to work at Grenelle, after having first worked at Clichy). Between Clichy and St Mandé, I believe that he worked for several years in Scandinavia....and he originally came from Stourbridge...isn't life complicated!
I might now consider putting some of my St Mandé on eBay, if they are going to sell for that kind of money!
Alan