By "line" I expect they mean a join - the place where the loop is completed.fiasco wrote:- the seam is probably where the dark line runs around the front of the wheel.
Looking closely at my `77s there is a very fine diagonal line at the top center of the wheel with what may be a slight change in the grain pattern. Frankly it is so fine that I cannot be sure.
BTW the book "Essential Fiat 124 Spider and Coupe`" describes the original coupe as having "a wood-rimmed steering wheel." The picture of that wheel exactly matches the one in my `77 Spider. Meanwhile the photo of the later, updated, model's interior shows what appears to be an obviously plastic wheel.
-don