They did make a bunch of changes when they went to the large format tags, like they were made pn completely different machines, different font, different spacings etc. The early norwood tags are the same as all of the LA tags as they never went to the larger format tags. Theres nothing of interest on this tag as it only indicates interior and exterior colors similar to the 68 tags so there really no reason to change it unless you were changing the color of the car on a high end restoration. This one appears to be in primer so I wouldn't think that's the case here. Someone did that the tag off some time in its life, see the little gap between the tag and the rivet that means the rivet is loose, and also the smeared and flattened out filler, those are both signs the tag has probably been off at one time or another. But as long as the VIN matches the 11C build date I wouldn't worry about it.