I’ve never seen a real BMW wheel NOT have either the full 11 or the last 7 digits of its part number as well as the other wheel specs around the front side of the hub or on the back side of the spokes...including a stamp that uses the BMW acronym.
Are you sure BMW and other wheel specs aren’t engraved or in raised letters on the back of the spokes (can’t tell if the wheel is forged or cast...forged will have specs engraved into the alloy...cast will have raised letters).
EDIT:
Realoem.com says that its a black wheel if you use
2-284-707 (which is the last 7 digits of the full 11 digit part number). The gray version of his wheel has a different part number
2-283–402. You can see this listed in the part number index at realism.com:
https://www.realoem.com/bmw/enUS/sho...43#36112284707