Sliding Door hardware
I'm afraid we don't have anything in our inventory like this. Based on the age of the window, there's a very good chance that we can't help you. All the same, I can try my best.
Before I go any further, can you tell me what this part does? Could I also see a photo of it installed?
There is another with a single handle on the opposite side. It functions the same way, but with one handle.
Thank you. These pictures are very helpful, but they only confirm my earlier suspicions. This handle set is way too old for us to supply a match. I have heard of handles working like you describe and I know for sure that they don't make them this way anymore.
The best option I can recommend is a surface-mount handle set like our 82-005. This is nice because it has its own self-contained mortise built into the handle, so it doesn't have to rely on any mechanism in the door itself. That allows it to work on just about anything. The catch is that you'll almost certainly have to drill new installation holes.
Sorry again that we couldn't get you a better amtch.
I was happy to help. If you ever need anything in the future, please let me know and I will do my best.