The early 105s had wood bearings and the late 105s had felt bearings according to the owners manual.
I do see the 102, 103 & 105 brushrolls with ball bearings, the ones that I have are all ball bearing.
I know the 541 had ball bearings from the start, then again the early 541s used the same brushroll as the 102, 103 & 105 having 6 sets of bristles on each side of the pulley, the late 541s had 5 sets of bristles on the right side of the pulley and 7 sets on the left side.