Not with an ABR-1!
Besides, old-format ink-stamped SNs are only used on the Historics; Gibson USA guitars have impressed 9-digit serials. A '99 Classic would have the form 9xxx9xxxx
ABR-1 and inked serial numbers are also found on Classics. Early classics even say "model" on the headstock and are often taken for a RI, best way to tell for sure would be to pull the neck pickup and check the tenon. Long - historic, Short - Classic.