Horizontal Adjustment Screw
In the back of the camera, inside the film bay, there is a screw between the viewfinder and the upper film guide rail. You remove that (DON"T lose it!), and it gives you access to this screw to adjust the rangefinder setting.
Mount the camera on a tripod. Place a piece of frosted tape across the film gate. Using a locking cable release, hold the shutter open on the B setting. Using a loupe or magnifying glass, focus the lens on infinity (anything over 100 feet/31 meters away), observing this on the tape. Use a small screwdriver to reach through the hole to this screw, and turn in small increments one way or the other until the two split images in the viewfinder match. Check other marked distances on the lens to see if they agree with the tape and viewfinder images. If not, check that when the lens is focused at infinity, the lens marking lines up with the barrel center mark. If not, you need to adjust the focus of the lens first. This usually only occurs when you have dissembled the lens, which we are not dealing with here, thank goodness.
It appears the horizontal adjustment screw is glue-locked. After doing the adjustment, try to put some nail polish on it to re-lock it, and do not forget to replace the port screw, or you will ruin your film when shooting.
Horizontal Adjustment Screw
In the back of the camera, inside the film bay, there is a screw between the viewfinder and the upper film guide rail. You remove that (DON"T lose it!), and it gives you access to this screw to adjust the rangefinder setting.
Mount the camera on a tripod. Place a piece of frosted tape across the film gate. Using a locking cable release, hold the shutter open on the B setting. Using a loupe or magnifying glass, focus the lens on infinity (anything over 100 feet/31 meters away), observing this on the tape. Use a small screwdriver to reach through the hole to this screw, and turn in small increments one way or the other until the two split images in the viewfinder match. Check other marked distances on the lens to see if they agree with the tape and viewfinder images. If not, check that when the lens is focused at infinity, the lens marking lines up with the barrel center mark. If not, you need to adjust the focus of the lens first. This usually only occurs when you have dissembled the lens, which we are not dealing with here, thank goodness.
It appears the horizontal adjustment screw is glue-locked. After doing the adjustment, try to put some nail polish on it to re-lock it, and do not forget to replace the port screw, or you will ruin your film when shooting.