The No. 00 was introduced in 1898 and your gun was made the next year.
Most lower grade Smith guns were bought in bulk and sold by hardware and sporting goods stores, or ordered from a catalog, but it is possible that a Research Letter might document your GGGF as the original purchaser, or at least the sales location
Please look over the "Shotguns" and "FAQs" sections on the Home Page for lots of information
After the gun has been evaluated by a qualified double gun specialist, you should enjoy using it, with appropriate shells, for many years and then passing it on to your own grandson