Frogmike, I’m sure those are not the original valve stems. In the 1980’s, I bought a bunch of wheels directly from Campagnolo (Technomagnesio) and the valve stems they supplied with the wheels were 100% aluminum. They were sealed by a single O-Ring on the inside and had a knurled aluminum cap. I’ll see if I can find a photo. Manufacturers like Speedline, OZ Racing and BBS all used the same valve stems, presumably because they were so light. I’ll see if I can find a photo and perhaps a source.
Update: looks like Wilkinson sells them. If I find another source, I’ll update this posting.
