We talked about the instrument clusters on trucks, wagons and Jeepsters. Here is the cluster on my '48 truck. In '48 the engine turned and lined panels both show up in the Parts book. My truck is a late '48, so it has the lined faceplate with black faced gauges. I suspect the speedometer is a replacement my Dad put in it in the mid-'50's.
Since that speedometer was what I grew up with, I kept it even though it wasn't truly original. I call that picture "A Happy Truck" - everything where it needs to be!