I really like these cameras and it breaks my heart to see one in such bad shape. When I first got this one it looked like it was kept on someone's dirty shelf. A simple damp cloth was not going to work. I used an old tooth brush and Windex to scrub off 50 years of grime from the outside of the camera. This picture is the aftermath clean but the finish is gone. Caution must be taken from swamping the inside of the camera. After the Windex wipe the outside with a damp cloth. Open the camera and allow it to dry.

Before going any further in a few spots the leather had come loose. I have read many different ways of gluing or cementing the leather down. First do not use a permanent glue ...Barge, Epoxy, Super Glue the leather needs to be removed to get to screws underneath. I have used Polybond but  prefer wood carpenters glue even a white or Elmer's glue. It's water soluble, no fumes and is easy to clean up any over spills. Just peel back the leather I use tooth picks to apply the glue than use clamps or rubber bands to hold in place till dry.

In my other repairs I have used common supplies to repair and refurbish my cameras and so here too. Good shoe creams have all the nutrients that dried out leather require.

I use a brush to apply the "Leather Cream" this is a nice rich black. Use Q-tips to get into the small spots.

Remember to open the camera to get the covered parts. 

After the "Leather Cream" has been on for 10-15 minutes take a few paper towels and remove the bulk of "Leather Cream" this is the messy part. Now take that horse hair shoe brush and give a good shine. (spit optional)

The main reason for working on this camera was the stiff coupled range finder. This not a complicated job the hardest part is getting the range finder and the focus reset. I also like to clean the lens of any haze.

Four screws hold the face plate on remove in any order.

Very gently remove the face plate.

The parts of the First lens assembly can be unscrewed and removed for cleaning. The middle lens is cleaned in place. Using Alcohol clean all the old grease and crud off all the removed parts and set the lens in a safe place for now. Using Alcohol and Q-tips clean as much of the gear assembly left on the camera.

Using Alcohol and a syringe flush out the gears, use a little compressed air to blow any dirt out.

Squirt and rotate

Simple lubricants I use the NYOIL just because I have it for shutters. Just remember a little goes a long way. Use a light grease on the large geared wheel that goes around the lens.

I was using a different drawing program and it saved over my master image. Blue arrows for light oil and the red for the grease. I also put some grease on the geared ring before putting it over the lens.

While the Range Rotation mechanism was apart the inside of the lens had some metal shavings in side and a little cleaning never hurt. The top ring unscrews but you have to keep the gears fro turning.

With the first lens and the front surface on the center lens cleaned and reinstalled. Face plate reinstalled time to get the back surface of the center lens and the back lens. Select the "B" shutter speed and use a rubber band to hold it open.  Set the aperture to fully open. Close the front cover.

Use a spanner wrench to remove the back lens clean it and set it aside.

Now you can get to the back surface of the center lens.

A lot of glare from my lights but the lens is now clean and every thing is ready to go back  together.  Screw in the back lens and this parts done.

Since the whole lens and range assembly has been taken apart it will have to be reset to infinity and the focus set. Check AGFA for how to.