Hans-Günter Kisselbach has come across a very special prototype: the hand sample from Oskar Barnack. He was curious to find out what the first Leica was still capable of and wanted to test it in practical use. What demands could it meet, and where were the limits that were only overcome through further development? With these questions, he began a four-year engagement with this sensational find, the camera that was the first step into a new era of photography. Hans-Günter Kisselbach tells the story of this camera here, describes it in detail, shows the images taken with it in the past and present, and adds a new chapter to the development history of the world's first 35mm camera – a history that seemed already written.