Jack, it sounds like your gun is a rebarreled B grade, which may have been serial no. 3. I have serial no. 9B, so if you need any pics, I can help. Your gun was probably made in very late 1892 or early 1893. In the beginning the Baker Hammerless guns went through several design changes, and I think in the first hundred or so, most of the changes happened.

http://www.bakercollectors.com/