I'm not sure what the os dimension of the bearing is but I'm thinking it is 1 3/8"
The only way I would have to check them is to get a bearing and try it in the holes to check and see how well it fits.
It's impossible to tell what the PO had on his mind when he "fixed" the wheels before, he may have not wanted to spend the money for new bearings and had that material laying around and the means to make it "work", or the holes in the wheels could be messed up and this is what he did to get him by, or any number of other things. Point being, don't be surprised if the holes in the wheels are "wollered" out and the right bearings don't fit any more. Not saying that is the case, just something to keep in mind.
Sorry I can't be more help. Maybe someone else will have some better ideas.
Good luck
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