All these Bearings are basically the same -- except for the retainer ring beside the bearings themselves

22211 Spherical Roller Bearing

SKF 22211 CCKJ/W33 (box Marked)   SKF 22211 CCK/W33 (Bearing Marked)

Spherical Roller Bearing - 55 mm ID, 100 mm OD, 25 mm Width, Tapered 1:12 Bore, Open, Steel Cage

SKF 22211 EK

Spherical Roller Bearing - 55 mm ID, 100 mm OD, 25 mm Width, Tapered 1:12 Bore, Open, Steel Cage

SKF 22211 EK/C3

Spherical Roller Bearing - 55 mm ID, 100 mm OD, 25 mm Width, Tapered 1:12 Bore, Open, Steel Cage

FAG 22211 EKJC3W33 (box Marked)  FAG 22211 EK.C3 (Bearing Marked)

Spherical Roller Bearing - 55 mm ID, 100 mm OD, 25 mm Width, Tapered 1:12 Bore, Open, Steel Cage