villager said:exactly as fiftywatt says ..the early mint collection used old superreal necks, so a few have fret binding..not many though...later mint collection(when the old superreal necks ran out) only the EG59-120 and above have fret binding..
To villager's point, I just got my hands on a 1982 EG57-50. It has the binding on the fret edges. Very different fret wire than I'm used to seeing with the later 80's era Mint Collection series. Fret profile is sort of narrow with a narrow flat crown. This example shows almost no usage for a 25 year old guitar.