Set of 4 Vintage Combination Lock and Stay Window Hardware

These clever devices were made by Morrow and patented in Canada in 1937. They go on the side of a single hung window mounted on either the sash or casing. Flipped one way the rubber tip keeps the window from opening and flipped the other way the rubber tip keeps the window open at whatever level you choose. When not in use they just hang generally parallel due to the counterweight. I’ve included a photo of the patent drawing and you will receive a copy of the entire patent via email with your purchase. These can be used with either one or two per window. They can be reversed by removing the screw and flipping the operator over.

The above price is for all 4 pieces. They are made of cast brass and are in excellent condition. I note no wear at all on the rubber stops. They might not have ever been installed.   
For size reference the arm is 2-1/2” long from tip of rubber to end of counterweight.