Hoping some experienced WUS Rolex readers may have insights on this issue, I'm trying to determine if one of these Datejust has an aftermarket dial. There are differences in the font, most specifically the watch on the left has "serif" type "tails" off the ends of, by example, the letters t, y, and L. This contrasts with the dial on the right, with no serif lettering. Also, the differences in the indicies designs. As I know Datejust there were a lot of variety in dials out there and these may both be original dials. The watch on the left is circa 1974, the watch on the right is circa 1978 (same watches in both photos, just included two shots in case helpful). Thoughts and comments? Thanks!