Sounds like a correct 99R. But 99T's didn't have factory studs.
Version 1 99R (1932-1947) - double lines around the forearm, no sling studs, no peep sight, forearm attached with a screw
Version 1 99RS (1932-1947) - double lines around the forearm, round / flat bottomed sling studs with swivels and sling, has peep sight, forearm attached with sling stud
99T (1935-1940**)- fat and wide forearm with short/sharp slant outs in front of receiver, no sling studs, no peep sight but with 99T specific sights, forearm attached with screw.
A 99R here (aftermarket brass plaque):
A late style of 99RS here;
99T with aftermarket scope: