Je vous remercie pour votre aide.
Here some other examples from cloth seals from Leiden (it's not my website, I'm not one of the detectoramateurs shown and those were not my finds). But it gives you an impression of the Dutch cloth seals.
http://wf4.nl/Engels/index/indexengelslakenloden1.htm
At the Duth forum: Muntenbodemvondsten.nl I made a table to determine cloth from all over the world (the examples I knew, I get a list of about 158 cities and countries which had cloth seals). It' s a pitty it's in Dutch, but you can get an overview of the cloth seals from Holland. Ps. You have to log in.
http://www.muntenbodemvondsten.nl/
I only give the link to those sites to give you an impression of the Dutch cloth seals.
Ps. It might be that someone of you found a cloth seal from Leiden in France (characteristic is the crossed keys in the arms of Leiden (don't confuse it with the cloth seals from Bremen (Germany) or the hemp- and flexseals from Riga (the often contain an x above the crossed keys)). A Gilden Fleece is also seen (bombazine). Often the name 'Leyden' is mentioned.
Please let me know if you found one (I'm doing a research to the dissemination of Leiden cloth seals, for museum De Lakenhal in Leiden. (clothseal@gmail.com or Lakenlood@gmail.com).
A pdf for the ones that are interested in cloth seals:
http://www.google.nl/url?sa=t&rct=j&q=geoff%20egan%20pdf&source=web&cd=8&sqi=2&ved=0CGAQFjAH&url=http%3A%2F%2Fdiscovery.ucl.ac.uk%2F1349956%2F1%2F488665.pdf&ei=lAs2UcyqKoiO0AXO6IGgBw&usg=AFQjCNGyd91VQIDr2-9EcRaGv6HsIKjPtw