Stickpin jewellery is not unique to Switzerland as can been by a basic Google search for that term.
"Stick pins were particularly popular from about 1880 to 1920. They were worn by both men and women. Usually on a jacket lapel but also on a necktie to hold in in place. A stick pin is by definition under four inches long but most I've encountered are between 2" and 2 1/2" long."
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It also appears "Anson" is in fact American.
"Since 1938, Anson has been designing and manufacturing premium silver and gold men's accessories in Providence, Rhode Island. As the former fashion jewelry making capital of the world, Providence is the perfect home from which to lead the revival of made in the USA men's accessories. "