I can't find a match in Petard for these poincons for either Klingenthal or Chatellerault - there are a number of Bs including Bick as mentioned by Jim. The star above - if that is a star - usually indicated the inspector had been promoted to 1st class.
Jean Binck page is at.
http://users.skynet.be/euro-swords/chatellerault.htm
and Klingenthal is at:
http://www.klingenthal.fr/presentation_marquages.htm
Hope that helps.
CC