As far as I know Monty had at least two Humber's. One in North-Africa/Italy and a new one from Normandy to Lüneburg Heath. Steve's observation is correct, the second Humber had a Notek blackout driving light. In the attached picture (from Monty's Memoirs ) the Notek "Tarnscheinwerfer" is present above the right horn. The picture is taken September 1. 1944 "crossing the Seine at Vernon by a pontoon bridge".
There must be a good reason for placing a Notek "Tarnscheinwerfer" in this particular car. The Notek "Tarnscheinwerfer" is a very good blackout driving light - from own experiences it is much better than the American blackout driving light - I haven't tried nigth driving with British or Canadian blackout driving lights so I won't comment on them but I suspect the mounting of a German blackout driving light in Monty's Humber have something to do with giving the driver the best possible (combination of?) blackout driving light(s).
