The "Vest Pocket Model B," which Mallory used on Everest, was introduced in 1924, and included several new design features. One of the most significant was the "autographic" window on the camera back.

Breashears was one of the most influential Americans in the world of Himalayan mountaineering summiting Mount Everest five times, including with the IMAX camera in 1996, his family said.

I returned to Everest the following year ... over the past year and deadly tired of being pestered to provide its cameras and columns with ghoulish facts or critical observations.

Breashears summited Mount Everest five times, including with the IMAX camera in 1996 ... In 1983, Breashears transmitted the first live television pictures from the summit of Everest, according ...