This page covers the sulky and gang plows of B.D. Buford & Co and the Rock Island Plow Co until 1900. Although I have tried to give some idea of the date ranges, these should only be considered rough estimates in most cases, especially for the discontinuance of the lines. In rare cases, I have some advertising or mention in trade magazines to point to an introduction date, but this is a rarity; so mostly I have to rely on appearance in advertising, particularly the pocket guides issued all through the 1880s-early 1900’s. As new literature comes available, my hope is to narrow some of these date ranges and model questions down further.