The 99-375 (Brushgun) pops up regularly for sale, sometimes a 99A in 375. They weren't sold long, but quite a number must have sold. The 99-358 Brushgun sales seemed to have almost stopped, there's very few 358's in my data after the375's came out even though both were catalogued.
Not "common", but probably not "rare".
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The Savage 99 Pocket Reference”.
All models and variations of 1895’s, 1899’s and 99’s covered.
Also dates, checkering, engraving.. Find at
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