I has been Leica C&P (Collector&Photographer) since 2006, when I brought my first M3., then....
General Information
Leica History - The Godfather of 35mm Photography by Thorsten Overgaard
7 reasons you should own a Thread Mount Leica by Hamish Gill
Reviews
Leica Standard review by Hamish Gill
Leica IIIa (Model G) review by Hamish Gill
Website
Early Leica cameras bear the initials D.R.P., which stands for Deutsches Reichspatent, the name for German patents before May 1945. This is probably a reference to German patent No. 384071 "Rollfilmkamera" granted to Ernst Leitz, Optische Werke in Wetzlar, on November 3, 1923.