It looks like this Part has been superseded by LEGO Part 3069b Tile 1 x 2 with Groove.
There are two known versions of this part:
3069a Tile 1 x 2 without Groove
This is the original version, introduced in 1965. The base of the part is flat, which makes it difficult to remove the part.
3069b Tile 1 x 2 with Groove
This is the modern version, introduced in 1974. The base of the part has a small groove, which makes it easy to remove the part.
The image on the right shows both versions. If unsure, use the modern version 3069b.
Click on a colored part below to see the Sets and MOCs that use part 3069a Tile 1 x 2 without Groove 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.