Thank you Jack, that info is some I was looking for. Older collectors would have knowledge of these. On page 195 of your second addition book there is a Milestone MN-202 Double large dial on Metal Plate for masonry mount. Erie on Page 135 same book.

These did not set out from the Wall, they mounted in the wall. I do not know the Gieger Brothers or how to get in communication with them. As I say the older collectors that have seen some of these may be long gone.
Thanks

Craig