It looks like this Part has been superseded by LEGO Part 3678b Slope 65° 2 x 2 x 2 with Bottom Tube.
Click on a colored part below to see the Sets and MOCs that use part 3678a Slope 65° 2 x 2 x 2 Smooth without Bottom Tube 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.
There are 3 Mold variations of part 3678a - Slope 65° 2 x 2 x 2 Smooth without Bottom Tube in the database, in use between 1978 to 2010. See Molds and other related Parts.