I first got a 1932 nickel plate fitted Leica II with an 11 o'clock Elmar from the classified here a few years ago. I have had some wonderful pictures from it. I had to fix the rewind knob which wouldn't extend, and the shutter mechanism works well at all speeds but is a bit screechy and needs lubrication. The front element has haze, but it adds to the charm and I will leave it.
So I got a later camera, a beatiful black paint 1937 Leica III and a good coated Elmar from 1951. The camera has been lubricated, but the RF is very dim and the spacing or the shutter or both are a problem and it will need a service.
Several months ago I was out carrying the Monochrom when I came upon a very young man with a screwdriver, lining up an old IIIc on a distant city building. We talked briefly, but he seemed not to have much time for an older man with a digital Leica.
Three months ago I went to the twice-yearly Australian Photographic Collectors' Society meeting at the Box Hill Townhall. On a table was a perfect looking IIIf with an indifferent Elmar. I asked the history of the camera only to be directed to the young man I had met near my house months earlier. He had serviced this camera, cleaning the rangefinder in particular and recovering it. He works for a camera store and picked up his skills on his own.
I bought the camera but not the lens. The camera is perfect. Probably has had less than a hundred rolls through it. It is currently my go to camera. I've mostly run Ektar through it.

IIIf by
Richard, on Flickr