The ball bearings and locknuts are shown in the first photo, but the appearance of the bearing housing does suggest that the saw was originally designed with babbitt or bronze bearings. I had a 36" Crescent saw that I bought at an auction of a furniture factory in VT in 1980 or so. I was surprised when I removed the wheels to move the saw that it had needle bearings where I expected to find babbitt, so I don't think it was unusual for a mfr to make this sort of change while continuing to reuse the old castings.
This is the same Crescent saw that I had, but it's old enough that it has babbitt bearings.