|Clockwise from left: Mystery, Pz I A, PZ I B and Pzjäg I.|
With this in mind I have been poking around looking for photos of the Panzer I (models A & B) from a similar angle. Results as per the crude photo-montages.
|Clockwise: Mystery, PZ I A & PZ I B.|
Could it be a Panzer I but have the gun facing the rear? Possible but to me the angles look wrong, as does the "vertical" plate which is not tall enough. I would say the clincher against this is that the vertical and side plates are at right angles whereas the Panzer I had "bevelled" corners.
The picture is poor and could indeed distort things but I am still at a loss!