All I know about this casing is that it was made for the Canadian Mounted Police:
Very strange are those sharp corners at both sides, that do not look ergonomic at all.
The lens barrel is totally enclosed, thus the casing only allows fixed-focus operation. The first use for such that comes to my mind is aerial photography. But then again I can hardly think of a situation were the camera is at great mechanical risk. What rests that I can think of would be a wheather protection in aerial use. But such adverse wheather typically exludes aerial photography.
What do I overlook? Who knows more about this casing?