I am the lucky owner of a list of Leica serial numbers, starting with the pre-production cameras in 1923 and up to 1965. I obtained it years ago in form of a bad photocopy. My apologies for that. However, even though it is incomplete, and even though other such lists have been shown, I feel it is still a very useful document which has shed light on many Leicas in the past and, I am sure, will do so in the future.
I have also been able to obtain some information the serial numbers of the Leica R cameras and on some of the Leica lenses.