Yup! Icebox latch. When I was a kid I rode with the local iceman and helped deliver ice. It was a horse drawn wagon in Baltimore in the late 50's. I remember a lot of those old icebox latches. Most were brass but some were iron and some were plated.
Whoa, I need a grog...
I nominate Gypsy for Genius status.....problem solved...you are good... I would have gone along with the hurd on the idea of window latch....hats off to ya.