This appears to be a Graflex KE-4 “Combat Graphic,” a military camera made roughly in the mid-1950s. It used 70mm film rather than standard 120 medium-format roll film, so while it is a larger-format film camera, it’s more accurate to describe it as a 70mm military/press-style camera than a typical medium-format consumer camera. The KE-4 was designed for military use and had interchangeable lenses, which matches the features visible in the photos.