Born in 1928 and died in 1984, Winogrand is considered by many to be one of the most influential American photographers of the 20th century. By the early 1970’s when he purchased this M4, he was shooting roughly 1000 rolls of film a year, a pace he accelerated until his death from cancer in 1984.
While Winogrand is known for his wide angle vision (many of his iconic photos were taken with a 28mm Elmarit) he typically carried two camera bodies with him, one with a 28 and one with a moderate telephoto. This particular M4 was produced in Wetzler in November, 1970, which means it probably saw 12 years and approximately 15,000 rolls of concentrated use by Winogrand.
According to Stephen Gandy, this M4 passed to one of Winogrand’s friends, who still uses the camera. I’m pretty certain Winogrand would have wanted it that way.