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Hi there! Thank you so much! I've fashioned a piece out of some hardened plastic (pictured below) and glued it to the mirror box. It took me an entire day of trial and error and starting over again to ensure that the piece fit perfectly and was a repair that would last. Everything works perfectly now and the camera is fully assembled and looking great. Thank you again to you and Conmai for all of the help. I'm so happy that this camera has a second life now!

I've included a photo of the other side of the mirror box in hopes that it shows the shock absorber bumper. I haven't studied this side as much as the other so at the moment I don't know if everything is as it should be. I never tried pushing the mirror up while the camera was fully assembled. While I'm sure a different mirror box would make it much easier to get this guy up and running, I wouldn't want you to have to give away parts you might need!

Hi, thank you for your reply! When I raise the mirror by finger it goes all the way with no sticking. What exactly is the mirror lifting bumper? If it is the small piece of foam that keeps the mirror from hitting the top of the mirror box when it is raised, then I believe it is fine at the moment. When I first got the camera when the shutter was fired the mirror would do a small little jump (as if it were wanting to lift up), but it would only be a few millimeters. Since that side of the mirror box couldn’t complete the full cycle, I would use the mirror lock knob to reset it, which would complete the firing of the shutter. If I leave the mirror locked up, the camera is able to fire on all shutter speeds just fine. I am beginning to believe that the mirror lifting spring does not have enough tension, since there is no other obvious mechanical failure. If there are any other photos of videos I could show you to help you see the issue, please let me know! Thank you so much!

I've been trying to repair the mirror in an olympus om 1n. The issue is that the mirror will not flip up when it should be. I've read the repair manual and other texts on this matter and have fully taken apart the mirror box. I have also applied a small amount of camera grease to each of the pivot points that are used when the mirror should flip up. I'll include a photo below that shows the isolated issue. The red arrow in the photo shows the direction that the lever should be moving, but for some reason it gets caught and doesn't travel all the way. The blue circle is where I have since applied some camera grease. There is nothing else that I can try that seems to make sense to me, so I'm hoping that someone here will be able to point me in the right direction!