vintage deco ironstone porcelain architectural surface light switches

Lot of three P. P. Inc white ironstone porcelain architectural light switches. These switches are made to mount directly on the surface of the wall or door frame. They are single pole and measure 5" long, 1 3/4" wide (side to side) and about 2 1/4" thick.

One of these switches looks to have never been used. Two of these have chips missing to the bottom corners of the upper portion of the switch housing (shows in the second photo).

There is also the remains of the original installation wiring instruction sheet.

These are from the estate of a man who worked architectural restoration and salvage for many years.