I just found a 1981 Specialized catalogue illustrated with photographs. A
drilled upper race of the type earlier discussed is shown with a Super Record
headset. The NR right next to it is undrilled. The Specialized headset shown
above it is drilled. My recollection is that this part was first available as
a SR item, and later included in some NR ones. I can surmise that either no
undrilled ones were available at the time they were packing boxes, or they
had a lot and wanted to use them up, or a mistake was made by a new employee.
Stevan Thomas
Alameda, CA