* Delete 1 Part 62821a Dark Bluish Gray Technic, Gear Differential with Inner Tabs and Open Center, 28 Bevel Teeth
* Add 1 Part 62821b Dark Bluish Gray Technic, Gear Differential with Inner Tabs and Closed Center, 28 Bevel Teeth
Comments from Submitter:
Parted out 4 sets recently and all contain the newer variant