I have a Specialized S Works E5 that came to me with a bad proprietary headset. I am largely unfamiliar with modern headsets, after some research and some headset spacers I was able to fit a Cane Creek headset that is much nicer than the original.
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1971 Paramount P-13 Chrome
1973 Paramount P-15 Opaque Blue
1974 Raleigh Professional Blue Mink
1991 Waterford Paramount
Holland Titanium Dura Ace Group
Holland Titanium Ultegra Triple Group