Variants of a mold are catalogued separately, so each one has its own sets and minifigs. Check these too if something you expect is missing here.

• 3009bpr0051 Brick 1 x 6 with 'Shell' Rounded 'e', Red Print this part is a alternate of it
• 3067 Brick 1 x 6 with No Bottom Tubes this part is a print of it