Nothing to do with the barrel that we know of. But your 99D might be too low to have the model stamp, in which case it's just an inspection stamp. Or maybe they used S stamps for D's. Probably too early to have a model stamp, they didn't start that until 1927? Notes at home.
“
The Savage 99 Pocket Reference”.
All models and variations of 1895’s, 1899’s and 99’s covered.
Also dates, checkering, engraving.. Find at
www.savagelevers.com
