I do not understand voltage regulators much and I was looking through my old regulator parts and some are NOS and I trust those settings. The one Lucas regulator that is NOS the gap on points on the right side coil is twice the size of a other newer one. The second one is Lucas also, but much newer. I do not know how much newer. I like the newest one because it is cleaner inside with no oxidation, but the caps on the points are so different. I guess the gap in no big deal just a different model, but I do not know. Moreover, if I did use the oxidized NOS one what do you guys think about the oxidized metal from age? everything clean ,but surface rust on the frame.