The 90's and I believe the early 2000's as well. Then they started to come out with the edge 2,3 zero... And zero II ect.
When you put in the new gotoh you have to reuse your posts. The gotoh ones are larger in diameter and will not fit. Also the gotoh does not come with a new locking nut. It has a new claw and springs.
Also! The coolest feature... The arm inserts, then spins in. Around the arm where it inserts is a collar with a nylon bushing that the arm fits into... It has a set screw... You can tighten or loosen the set screw to your preferred tightness. It's the best arm adjustment for a double locking trem hands down.