This is a great brooch by Dutch jeweler Hans Appenzeller made in sterling silver in 1984.  You can find more info about Appenzeller here in this article from 1985, which shows a retrospective of his work including the matching earrings to this brooch:

This brooch is signed "appenzeller" and "sterling".  Measures 2.25 x 2.25".  Comes with original box.  

All purchases from Bavier Brook arrive in an elegant box, fully wrapped in fine paper. Please inquire for international shipping. Don't hesitate to ask if you have any questions, we are happy to answer them!