Shipped this thing from Japan but idk what model it is

Shipped this from Japan last January arrived the other day. I started to worry when I saw that there wasn't much info about the guitar. I looked it up on google with the photo search and found some that was the exact model, but all we had something in common, they all failed to identify what model it was. I was worried too about the "RG" print since it was not as pronounced as recent models. This was then backed up by some websites starting that it was maybe because of different printing methods of Japan and Korea or maybe the technology in the 90s. Other than that, it plays very well and it sounds superb, it also stays in tune, the frets and not sharp, thetunersa doesn't feel cheap and the knobs are great. I also opened the trussr cover the and cavity and observed somediscolorationn I think maybe coz its old?

Any help on identifying or verifying its authenticity would be greatly appreciated.