horse bit anatomy great info Great, but really there's just Mullenmouth (top pic) and Jointed Mouths (bottom pic). They have almost the same parts, with some differences. The mouthpiece doesn't determine if its a curb or snaffle.
real working saddle (and tack) has "got 'er done" for a good long time. When country folks look at a saddle, they see a lot of details that a city person can't see. Things that determine the quality of the saddle and what it is used for.