I assumed this BB was your regular loose bearing kind that i've seen on bikes of this era, especially since it had a lockring and whatnot.

I noticed a little play in it, and I hadn't greased it so i was gonna do that, but when i opened it up i saw it was a cartridge. the play was apparently just from the one side not being screwed in all the way i guess

only markings i could find on the cartridge itself are "129" and "japan". The lockrings have "137 X 24T R" on them



stupid autofocus wouldn't focus right.. it's got a lockring and "cups" like this on both sides. the cups have holes for a pin spanner and some other indentation near the spindle