This is another one of those parts that should be replaced anytime you can get near it. While it is not uncommon for them to look visually 'ok', the cost of failure is so high that it is worth the samll investment to be sure. This particular bearing is the one that fits on both ends of the idler gear shaft in pre A+ 4 sync applications.
I.D.(shaft diameter) .750", O.D.-1.063".