My guess at age is around 1890s and is marked gold filled. The nose piece adjusts to your nose hence the word pince nez. The dainty chain has a 2 1/2 hair pin that is attached. I can see these on display or even using them for that steam punk effect. It has a case that says C.B. Wilson M.D. Bradford, VT. They are still in very good working condition. Check out the pictures on this era of history.