I figured the base was not marked since the question was "point me in the right direction". I can't put my finger on my RB and I thought most were marked Smalley somewhere on them but there had to be at least one with just the monogram.. [8|]
It is being sold at auction, I was intrigued as to it's maker. I am not sure what size it is or what is on the bottom. I will probably pass on it ( unless the price is very right ) .
It shows quart on it and can only be 2652 or start adding -1, -2 etc.. A newer RB might have some listed. If you end up with it, please come back with an update.