Leica's M3 converted to single-wind — modified from double-stroke to single-stroke film advance.
The Leica M3 (Chrome, converted to single wind) is the original Leica M camera — introduced 1954 as the first M-bayonet Leica — in chrome finish, converted from the original double-stroke film advance to a single-stroke mechanism. The M3 introduced the M bayonet mount. Leica M mount.
35mm film rangefinder. All-mechanical shutter (1/1000s maximum). 0.91× viewfinder (highest magnification in M series — framelines for 50mm, 90mm, 135mm). No built-in light meter. Single-stroke advance (converted from original double-stroke). Chrome finish. At approximately 580g. Leica M mount.
The M3 is regarded as one of the finest rangefinder cameras ever made — the 0.91× viewfinder is the largest and clearest in the M series. No internal meter means exposure is manual (use a separate handheld meter). The single-stroke conversion is a common upgrade improving shooting speed; double-stroke M3 cameras are rarer for purists.
On the used market the Leica M3 Chrome (single wind conversion) is a classic vintage rangefinder. Condition checks: rangefinder patch and viewfinder condition (critical — should be bright and sharp), shutter at all speeds including 1/1000s, single-stroke conversion quality, advance lever. No meter — external meter needed. Leica M mount.