tried to do a deep dive for you- quite probably made in year 2000 before moving to Chinese production. Perhaps try contacting regal with your info https://www.sagamusic.com/products/guitars/regal/
It is a fine looking guitar, worthy of play. I have owned a 12 fret National style N for several years, and should you choose to replace biscuit and cone, best to find someone familiar and adept with the process, as it is easy to mess up the cone. Change one string at a time to avoid cone collapse...happy picking!