I purchased these at a Twin Cities swap meet a few years ago. All it has inside and out is the red and yellow N sticker and the model # of cartridge bearings. 20 hole front and 24 hole rear. Black aluminum and low flange. They are very smooth and I am trying to figure out if I should build them up or sell them on eBay. It would be great if someone can tell me what brand they are and if they are very good. thanks for the help!
