|There are two known mold versions of this part:|
2357 Brick 2 x 2 Corner with Solid Pins
This seems to be the original version, introduced in 1987. The two inside pins are solid.
2357 Brick 2 x 2 Corner with Hollow Pins
This seems to be the modern version. The two inside pins are hollow.
Click on a colored part below to see the Sets and MOCs that use part 2357 Brick 2 x 2 Corner 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.