Seymour lists three different designs that are similar to those you show:

PS-SH

PS-SH Variation

PS-SM

These are all pretty good chips, valued at $8-10 by Dale.

If you include all horseshoe designs, including those with a circle around the shoe rather than a plain chip, there are 18 different catalog numbers.

If you are going after the antique clay chips, you would be well served to buy a copy of Dale's book. He has published one supplement, and several additions have been published in the Club magazine. The book includes ivory chips as well as clay chips if you have an interest there.