Brown Security Mirror

9" x 7" arm extends 10"Metal & Mirrored GlassTHE NETHERLANDS There is a book called 700 Centenboek that consists of photomontages of many things that are typical of Amsterdam, for instance: houseboats and herring carts and garbage cans. Also included is a page of over-the-door security mirrors - a typical object found on the streets, noticeable if you look hard enough. Definitely created in pre-digital times, the mirrors had me wondering, but no one could give me any answers. It seems like they were all installed prior to 1975. Could they have come out of the red-light district? And when was Amsterdam such a dangerous city with a need for such things? The brown is so typically Dutch. I can't explain it. In any other place, except maybe for London, I would find it to be such an odd object, but in Amsterdam, it seems so right. Place over a doorway and position the mirror so that the person ringing the bell is in view from your window: you see them, but they won't see you. Also can b