Ooh.. actually I guess there's two 1951 catalogs. One that looks like this, and one that's a lot different. Guessing the similar one is a sales guide, and the other a consumer catalog.

Which would argue for this being the 1952 sales guide.

PS: Interesting note on the 99's page...

Quote
Weaver Model K Telescope Sights are supplied and fitted to Model 99 rifles at the factory on special order. Precision, all-weather scopes with achromatic lenses. ...

Might be the explanation for those drilled and tapped EG's that we see sometimes..

“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