FX and FJ had no vent window lock buttons so a tool was easily made by crooks to slip under the window, turn the handle and flip it open. FE introduced the lock button which pretty much stopped the crooks but there were still enterprising thieves who were able to make a tool that slipped under the window, pushed the button, then turned the handle. I have one of these tools from an old garage - apparently they used it for unlocking cars with the keys locked inside.......
I've never seen anything like the locks you have pictured but they look pretty well made. Maybe just an enterprising back yard engineer.
Ken