Over 20 years ago Dr. Robert Bingham supplied negatives of Leica No. 122 to aid my research efforts. A photo of the top of this historic Leica appears on page 14 of my Volume I – Cameras. Additional views are included here. By Dr. Bingham’s admission, the photos are just snapshots that he took of the camera outside in the sunlight. This surviving O-Series model represents ( along with the Ur-Leica ) where it all began.