Jim DeLaney, Austintown, Ohio
Any idea how old it is? I remember back to the late 50s, when my Dad bought his first carbide blade. It was a Craftsman 8 tooth one. At that time, it was Sears' (Craftsman) top-of-the-line blade and was very expensive by comparison to then-conventional blades.
Dad thought it was a huge improvement over the steel blades available back then.