If this gizmo is similar to the WW2 odograph then I have one buried in the warehouse. I don't recall a manual because another collector in Quebec has one and needed a manual also. All I remember is that mine was missing a gear drive that, at the time, seemed important to make it work.
I had assumed it worked using a compass and distance travelled (like the Land Odograph) but maybe it actually used a gyro. It is buried deep but may getto it in the New Year.
.... Brian
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