It looks like this Part has been superseded by LEGO Part 3794b Plate Special 1 x 2 with 1 Stud with Groove (Jumper).
Click on a colored part below to see the Sets and MOCs that use part 3794a Plate Special 1 x 2 with 1 Stud without Groove (Jumper) 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 3794a - Plate Special 1 x 2 with 1 Stud without Groove (Jumper) in the database, in use between 1978 to 2017. See Molds and other related Parts.