Tamarkin has a nice timeline of Leica M analogue (film) cameras on their website: Leica M3 (1954 – 1966) Single-Stroke or Double-Stroke film advance Largest RF magnification of any M camera – 0,93 35mm lenses require “RF” attachments on lenses Bright-line frame-lines for 50, 90 and 135mm Leica MP (1956 – 1957) Single-Stroke and Double-Stroke … Continue reading Timeline of Leica M analogue (film) cameras