The camera is a non-folding rangefinder camera for 6x7 on 120 film. The film is advanced by pulling a knob out of the side of the camera and pushing it back in. It was a rapid advance for medium format at the time, and gives you more the feeling of cocking a pump shotgun than winding a camera. The coupled rangefinder and viewfinder were separate, with the eyepieces one above the other. The lens is a fixed 90/3.5 Omicron in a synched leaf shutter.
The styling is unusual, vaguely like the styling of their enlargers. I would try and describe it, but there are pictures, so you can see for yourself. One accessory is the Omegaflash, which holds six flash bulbs and rapidly places a fresh bulb into the reflector. A version was produced for the Signal Corp of the US military, which is olive drab, and is set up for 2-1/4 x 3-1/4" film packs only. This is the Signal Corp Combat Camera.
This was the only camera that Simmon Brothers produced. The design was sold to Konica, and evolved into The Koni-Omega line of cameras, which are a bit more modern looking, continue the design with the push-pull film advance.
The boxed camera, and it's unusual boxed flash