I recently installed a rear sprocket hub bearing for a 2009 BMW F650GS Twin and the bearing I got from BMW was a SKF.
That is good to know, since I own one and may need new wheel bearings some day.
I might add that my daughter rides a 1981 R65LS which has all of its original bearings, which have never been serviced or greased. The bike spent much of its time in rainy Seattle before moving to the SF Bay Area and rarely gets washed or cleaned. It now has over 80,000 miles on the clock and I keep wondering how long those bearings can last.
But they are still hanging in there.
She also has the original took kit under the seat that contains just about every tool you need to fully maintain the bike. Although the fabric tool roll is looking pretty sad, the tools still look almost new, with not a touch of rust on them. BMW really were using some quality components in those days. They didn't worry much about cutting costs. They just wanted their motorcycles to last as long as their owners.