The 6141 has the mold adjustment on top, the older 4073 has the mold adjustment on the side. The 4073 has also appeared on a sprue in sets. See Bricklink 4073c01
Click on a colored part below to see the Sets and MOCs that use part 6141 Plate Round 1 x 1 with Solid Stud in that color. You can find an overview of all LEGO Colors here.
If a color is missing, it probably needs to be added to a Set Inventory.
This part has been used by MOCs in the following colors but not officially released.