The seam that separates the roof from the back panel on my ‘47 3100 AD is “open” as there is no caulking in it. Seems over time water could creep into the seam causing rust issues.
Was the seam originally filled with caulking or something else? The exposed seam does offer an interesting line break but I’m leaning towards seam filler and painting over it.
Looking for info on the original from factory condition as well as what others have done to deal with this issue.