The AMBC stand for Amis de la Maison de la Bootes en Caoutchouc, or loosely translated, Friends of the House of Rubber Boots. It is a museum in France dedicated to the history and preservation of rubber boots. I kid you not.
I often contribute illustrations used at the museum as well as on their nonprofit website [ http://bottescaoutchouc.free.fr ] and on flyers and mailers. They even have an attached weekend lodge open for visitors to stay, provided they abide by the dress code and at all times wear big rubber boots (chest waders and hipboots are also acceptable).
I have been a card-carrying member of the museum since 2004. Swear to God.