The windows in our house have these cast metal latches. They are very plain and the cam breaks off from the attachment to the lever. I find very similar latches on the various sites and these have slightly different dimensions. The overall width is 2 7/8", the screw holes are at 2" OC and the screw set back is 15/16".
On the inside there is a cast marking that looks like an emblem of Texas with the letters MDC 7.
If possible I would like to purchase 20-24 of these latches.
Thank you, Joel