Any idea what this lock is?

[rkennedydca]

I have an old home with many different locks and have started the process of repairing the many different locks. This is some sort of interior bolt lock that is missing the blot. it exists on only one door in my home. Any ideas what I have here? I have a pencil in there so I could see how it lines up.

https://imgur.com/gallery/XlflmeY

Looking to repair or replace the bolt without damaging door. Any help greatly appreciated

[Squelchtone]

Looks like a mortise privacy bolt / flush bolt

This is kinda sorta similar: https://www.myknobs.com/shl265b5.html