OK you are correct about your statement of disc/hub.
Your bearings did have "no lack of grease"!! 
Good thing, but better to be safe than sorry! We were on a tour in France with a guy that had just bought a "fully restored" Pantera.....that suddenly locked up a front wheel.....upon some roadside mechanical work we discovered NO GREASE in the wheel bearing! Car was towed to nearby shop for further work. I suggested that they check the other side just to be safe....... Yup, NO GREASE there either!!!
SO, you've got grease. There must have been a seal some where in all that grease.....clean things up a bit and look at the bearings and races for blueing or wear streaks......odd wear....... The bearings and races could actually be in very good condition!
Your bearing/race numbers will be stamped or etched on the inner races of the bearing and the outer side of the races. If you are doing it by hand, as set of bearing "pushers" comes in handy....... or a brass drift/punch of sorts..... Softer material prevents damage to the races...... You WALK them out if using a drift....a little at a time.....you don't want to damage that aluminum carrier. Otherwise a bearing puller or similar on a press to pull/push them straight out is best.
Grease on!!!
Steve