Bottom stud holder may have symmetric (compare to part 11153) or asymmetric (compare to part 61678) 'teeth'.
Lego mapping includes Design ID 63278 for Metallic Silver version.
Click on a colored part below to see the Sets and MOCs that use part 50950 Slope Curved 3 x 1 No Studs in that color. You can find an overview of all LEGO Colors here.
This part has been used by MOCs in the following colors but not officially released.