This is an immigration pin. Cornelis Antonissen Van Slyke sailed from Netherlands (Holland) to the New World in May 1634. He met and married the French-Mohawk woman Ots-Toch and had several children by her

I've written three books about the Van Slyke family - two about Cornelis and one about his nephew Willem Pieterse Van Slyke

See details of the family at http://www.olivetreegenealogy.com/nn/surnames/vslyke.shtml