Can you get any other pictures from where you got the one you posted? Obviously they used SKF bearings, from the picture they look like double row ball bearings. They could be self aligning or just a 5xxx series bearing. A view from the end of the box, if it shows numbers would be very helpful, you could price the bearings with that information.
If the bearings have never been replaced I would assume that the grease would be a Kluber product. German machine, German grease. Maybe a reach out to Kluber would be helpful determining which grease was used.
I would look for signs around the bolt heads, seals, nuts etc. even breaks in the paint job that would indicate bearing replacement.
Confidence: The feeling you experience before you fully understand the situation