In contrast with 2454b, this mold variant has asymmetric inside ridges (compare to part 61678). It was reported that a stud may fit very tight in the middle position.
Click on a colored part below to see the Sets and MOCs that use part 2454a Brick 1 x 2 x 5 with Blocked Open Studs and Bottom Stud Holder with Asymmetric Ridges 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 4 Mold variations of part 2454a - Brick 1 x 2 x 5 with Blocked Open Studs and Bottom Stud Holder with Asymmetric Ridges in the database, in use between 1988 to 2019. See Molds and other related Parts.