The two on the left are the variant without the WT triangle, the two on the right are the different variants with the logo. As you can notice the two on the left appear to have a slightly taller dome but a lower wire groove and shorter skirt. Also the two on the left seem to share the same problem. They both have a slightly crooked upper wire ridge leaning to the right side that makes the wire ridge appear narrower on one side. Did they come from the same mold? Anyone else have similar pieces?