Both my 88 and 89 RG7xx guitars have this on the neck heel. The late 80's 540 Raduis and Saber necks I've seen on **** have had something similar as well.
Based on Rich's info the bunch of times this has come up, and the slightly different codes on other necks:
WALRJ-T24 = Wizard(Profile) Angled(Headstock) Locking(Nut) Rosewood(Fretboard) Jumbo(Frets)- Teeth(Inlays, every neck I've seen with the T has the Sharkteeth) 24(Number of frets)

Based on Rich's info the bunch of times this has come up, and the slightly different codes on other necks:
WALRJ-T24 = Wizard(Profile) Angled(Headstock) Locking(Nut) Rosewood(Fretboard) Jumbo(Frets)- Teeth(Inlays, every neck I've seen with the T has the Sharkteeth) 24(Number of frets)