It looks like this Part has been superseded by LEGO Part 32064a Technic Brick 1 x 2 with Axle Hole Type 1 [+ Opening] and Bottom Pin.
Several variations of part 32064 exist:
- Bottom ridges look like a stud holder with asymmetric 'teeth' (compare to part 61678) but do not allow connecting a stud in the middle position.
- Reduced casing has gaps in sides (refer to the second photo below).
- Rare variation whose axle hole has Type 1 opening on one side and Type 2 opening on the other side (refer to the third photo below).
Click on a colored part below to see the Sets and MOCs that use part 32064b Technic Brick 1 x 2 with Axle Hole Type 2 [X Opening] 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.