Hi Jim, yes there are a few versions of the redline tires US Royal was producing in the 60?s with varying details. The version used on the assembly line was the version without scallops, like the one in your photo. The assembly line versions without scallops either had the ?Safety First? shield logo or it did not. It is a difficult task hunting down all 5 tires with the same details. Would you consider parting with yours or consider trading it for other equal neat nos parts?
-Matt