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..
poly finish up to EG59-70.... EG59-85 and higher are nitro...EG59-85 had double tricks and above had dry1982
Here's an example of Villager's above point. An early Mint Collection EG59-50, which still has "Super Real" on the headstock along with the Mint Collection style Greco "cut o" logo. I've seen very few of these,
but the earliest Mint Collection catalog I've seen is full of photos of Greco's like the one below.