The camera appears to work in that I see the shutter flash when you push down on the lever. Beyond that, I have no way of testing it. The mother is 99 and said that her husband brought it home from the pacific during his time he served in World War II. Here is what I found on the internet.
(1939) (14th Showa) A very early "Hit"-type camera. Fixed-focus 20mm (f4.5-11) lens. Speeds of B, 1/25 - 1/100. It has a square viewfinder on the top. There is no streamline housing as found on the HIT style cameras, but a square optical finder attached to the top.
Next to the finder is a small disc marked T. Thanks for viewing my auctions. This item is in the category "Cameras & Photo\Vintage Movie & Photography\Vintage Cameras\Subminiature Cameras".
The seller is "gamb_200" and is located in this country: US. This item can be shipped to United States.