Just to throw some terms out that might help to keep the discussion clearer....

Serial numbered rifles under 10.000 == Savage 1895
Serial number rifles from 10.000 to 220,000'ish == Savage 1899
Serial number rifles above 220,000'ish == Savage 99


A 10.0xx rifle should definitely be a model 1899, I don't think we've identified any receivers made at Marlin that has an 1899 serial number.

So you have a very early 1899, which you can't fit a later stock onto.

Quick measuremens:
1895 receiver 464x has the tang extending about 3.15" back from the sides where the side panels would hit.
1899A SR receiver 10.7xx is 3.15".
1899A receiver 46.0xx is 3.15".
99T receiveer 350,xxx is 3.02".
99F receiver 936,xxx is about 3.02".


This correlates pretty good with what I've heard, which is that there was only about a 1/8" change at 90.000. As Joe said.


Pictures of your receiver are definitely in order, with a measurement if you can.


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