Rudi,
Since I don't speak French, I could figure out how to use that site. However, here is a new photo up for auction that shows a major church and says that this is St Omer. The problem is that we have other photos of the same a/c that say Amiens. See what you think.
http://cgi.ebay.com/ws/eBayISAPI.dll...#ht_2490wt_907
http://cgi.ebay.com/ws/eBayISAPI.dll...#ht_2661wt_907
There are at least three different churches in the photos of this a/c visible in the background, which should absolutely confirm whether this is St Omer or Amiens.
Regards,