How many miles have they travelled?
I would change them if I was you.
Why?
Don’t you want to inspect/change the bearings? Are they new?
They are felt indeed. The metal piece in front is a cover and keeps the felt in place, It’s a pressed fit but you can easily pry it out.
Once the seals are out you can pull the inner races of the bearings out. If the outer races are smooth and rust free you can maybe leave them and reuse the bearings.
Take great care to note all the shims between the bearings as they determine the preload.
On the other hand, the felt seals are useless, good only in absorbing humidity and dirt.
Very easy to put modern lip seals.
An other good idea is to drill two hole for vents so the grease can reach the bearings.